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Sample records for 935-940 mhz bands

  1. 47 CFR 90.615 - Individual channels available in the General Category in 806-824/851-869 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Category in 806-824/851-869 MHz band. 90.615 Section 90.615 Telecommunication FEDERAL COMMUNICATIONS... Governing Licensing and Use of Frequencies in the 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies...-824 Mhz, 851-869 Mhz, 896-901 Mhz, and 935-940 Mhz Bands § 90.615 Individual channels available in...

  2. 47 CFR 90.615 - Individual channels available in the General Category in 806-824/851-869 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Category in 806-824/851-869 MHz band. 90.615 Section 90.615 Telecommunication FEDERAL COMMUNICATIONS... Governing Licensing and Use of Frequencies in the 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies...-824 Mhz, 851-869 Mhz, 896-901 Mhz, and 935-940 Mhz Bands § 90.615 Individual channels available in...

  3. 47 CFR 90.615 - Individual channels available in the General Category in 806-824/851-869 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Category in 806-824/851-869 MHz band. 90.615 Section 90.615 Telecommunication FEDERAL COMMUNICATIONS... Governing Licensing and Use of Frequencies in the 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies...-824 Mhz, 851-869 Mhz, 896-901 Mhz, and 935-940 Mhz Bands § 90.615 Individual channels available in...

  4. 47 CFR 90.615 - Individual channels available in the General Category in 806-824/851-869 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Category in 806-824/851-869 MHz band. 90.615 Section 90.615 Telecommunication FEDERAL COMMUNICATIONS... Governing Licensing and Use of Frequencies in the 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies...-824 Mhz, 851-869 Mhz, 896-901 Mhz, and 935-940 Mhz Bands § 90.615 Individual channels available in...

  5. 47 CFR 90.615 - Individual channels available in the General Category in 806-824/851-869 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Category in 806-824/851-869 MHz band. 90.615 Section 90.615 Telecommunication FEDERAL COMMUNICATIONS... Governing Licensing and Use of Frequencies in the 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies...-824 Mhz, 851-869 Mhz, 896-901 Mhz, and 935-940 Mhz Bands § 90.615 Individual channels available in...

  6. 47 CFR 90.617 - Frequencies in the 809.750-824/854.750-869 MHz, and 896-901/935-940 MHz bands available for...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...-167-168-169-170 J 181-182-183-184-185-186-187-188-189-190 K 201-202-203-204-205-206-207-208-209-210 L... following channels will be available at locations farther then 110 km (68.4 miles) from the U.S./Mexico.... 87-112: channels 1, 39, 77, 115, 153. (2) Except as provided in paragraph (a)(3) of this section,...

  7. 47 CFR 90.617 - Frequencies in the 809.750-824/854.750-869 MHz, and 896-901/935-940 MHz bands available for...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...-167-168-169-170 J 181-182-183-184-185-186-187-188-189-190 K 201-202-203-204-205-206-207-208-209-210 L... following channels will be available at locations farther then 110 km (68.4 miles) from the U.S./Mexico.... 87-112: channels 1, 39, 77, 115, 153. (2) Except as provided in paragraph (a)(3) of this section,...

  8. 47 CFR 90.617 - Frequencies in the 809.750-824/854.750-869 MHz, and 896-901/935-940 MHz bands available for...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...-167-168-169-170 J 181-182-183-184-185-186-187-188-189-190 K 201-202-203-204-205-206-207-208-209-210 L... following channels will be available at locations farther then 110 km (68.4 miles) from the U.S./Mexico.... 87-112: channels 1, 39, 77, 115, 153. (2) Except as provided in paragraph (a)(3) of this section,...

  9. 47 CFR 90.617 - Frequencies in the 809.750-824/854.750-869 MHz, and 896-901/935-940 MHz bands available for...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...-167-168-169-170 J 181-182-183-184-185-186-187-188-189-190 K 201-202-203-204-205-206-207-208-209-210 L... following channels will be available at locations farther then 110 km (68.4 miles) from the U.S./Mexico.... 87-112: channels 1, 39, 77, 115, 153. (2) Except as provided in paragraph (a)(3) of this section,...

  10. 47 CFR 90.617 - Frequencies in the 809.750-824/854.750-869 MHz, and 896-901/935-940 MHz bands available for...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...-167-168-169-170 J 181-182-183-184-185-186-187-188-189-190 K 201-202-203-204-205-206-207-208-209-210 L... following channels will be available at locations farther then 110 km (68.4 miles) from the U.S./Mexico.... 87-112: channels 1, 39, 77, 115, 153. (2) Except as provided in paragraph (a)(3) of this section,...

  11. 76 FR 11681 - Improving Public Safety Communications in the 800 MHz Band; New 800 MHz Band Plan for Puerto Rico...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-03

    ... systems operating in the band, 69 FR 67823, November 22, 2004. In a Third Report and Order and Third..., USVI incumbents in the 806-809/851-854 MHz band segment will be relocated to comparable spectrum in the... COMMISSION 47 CFR Part 90 Improving Public Safety Communications in the 800 MHz Band; New 800 MHz Band...

  12. 47 CFR 101.79 - Sunset provisions for licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. 101.79 Section 101.79 Telecommunication FEDERAL... licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. (a) FMS licensees will maintain primary status in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands unless and until an...

  13. 47 CFR 101.79 - Sunset provisions for licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. 101.79 Section 101.79 Telecommunication FEDERAL... licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. (a) FMS licensees will maintain primary status in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands unless and until an...

  14. 47 CFR 101.79 - Sunset provisions for licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. 101.79 Section 101.79 Telecommunication FEDERAL... licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. (a) FMS licensees will maintain primary status in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands unless and until an...

  15. 47 CFR 101.79 - Sunset provisions for licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. 101.79 Section 101.79 Telecommunication FEDERAL... licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. (a) FMS licensees will maintain primary status in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands unless and until an...

  16. 47 CFR 101.79 - Sunset provisions for licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. 101.79 Section 101.79 Telecommunication FEDERAL... licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. (a) FMS licensees will maintain primary status in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands unless and until an...

  17. 75 FR 35315 - Improving Public Safety Communications in the 800 MHz Band; New 800 MHz Band Plan for Puerto Rico...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-22

    ... public safety and other land mobile communication systems operating in the band, 69 FR 67823, November 22... Puerto Rico market compared to other markets, 72 FR 39756, July 20, 2007. Rather than specify a band plan... 800 MHz band reconfiguration in Puerto Rico as well as alternative band plans, 73 FR 40274, July...

  18. 47 CFR 15.231 - Periodic operation in the band 40.66-40.70 MHz and above 70 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Periodic operation in the band 40.66-40.70 MHz... Periodic operation in the band 40.66-40.70 MHz and above 70 MHz. (a) The provisions of this section are restricted to periodic operation within the band 40.66-40.70 MHz and above 70 MHz. Except as shown...

  19. 47 CFR 27.1102 - Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 2110-2155 MHz bands. 27.1102 Section 27.1102 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz, 2110-2155... the 1710-1755 MHz and 2110-2155 MHz bands. (a) Eligibility for small business provisions. (1) A...

  20. 47 CFR 90.663 - MTA-based SMR system operations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.663 MTA-based SMR system operations. (a) MTA-based licensees authorized in the 896-901/935-940 MHz band pursuant to § 90.661 may construct and operate...

  1. 47 CFR 90.661 - MTA-based SMR service areas.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.661 MTA-based SMR service areas. MTA licenses for SMR spectrum blocks in the 896-901/935-940 MHz band listed in table 4B of § 90.617(d) are available in 51...

  2. 47 CFR 90.663 - MTA-based SMR system operations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.663 MTA-based SMR system operations. (a) MTA-based licensees authorized in the 896-901/935-940 MHz band pursuant to § 90.661 may construct and operate...

  3. 47 CFR 90.661 - MTA-based SMR service areas.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.661 MTA-based SMR service areas. MTA licenses for SMR spectrum blocks in the 896-901/935-940 MHz band listed in table 4B of § 90.617(d) are available in 51...

  4. 47 CFR 90.663 - MTA-based SMR system operations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.663 MTA-based SMR system operations. (a) MTA-based licensees authorized in the 896-901/935-940 MHz band pursuant to § 90.661 may construct and operate...

  5. 47 CFR 90.661 - MTA-based SMR service areas.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.661 MTA-based SMR service areas. MTA licenses for SMR spectrum blocks in the 896-901/935-940 MHz band listed in table 4B of § 90.617(d) are available in 51...

  6. 47 CFR 90.663 - MTA-based SMR system operations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.663 MTA-based SMR system operations. (a) MTA-based licensees authorized in the 896-901/935-940 MHz band pursuant to § 90.661 may construct and operate...

  7. 47 CFR 90.663 - MTA-based SMR system operations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.663 MTA-based SMR system operations. (a) MTA-based licensees authorized in the 896-901/935-940 MHz band pursuant to § 90.661 may construct and operate...

  8. 47 CFR 90.661 - MTA-based SMR service areas.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.661 MTA-based SMR service areas. MTA licenses for SMR spectrum blocks in the 896-901/935-940 MHz band listed in table 4B of § 90.617(d) are available in 51...

  9. 47 CFR 90.661 - MTA-based SMR service areas.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.661 MTA-based SMR service areas. MTA licenses for SMR spectrum blocks in the 896-901/935-940 MHz band listed in table 4B of § 90.617(d) are available in 51...

  10. The 121.75 MHz band pass filter

    NASA Technical Reports Server (NTRS)

    Davis, R. J.

    1975-01-01

    Prior to the ASTP joint flight it was observed during various tests on the USA's VHF/FM system, that the 121.75 MHz receiver unsquelched when exposed to certain RF power levels at a frequency of 142.417 MHz. Tests were conducted in an effort to arrive at a solution. Several recommendations were made but the most feasible was to insert a selective band pass filter in the transmit/receiver line of the VHF/FM transceiver. The tests were performed on the filter to determine the frequency response and rejection capabilities at 142.417 MHz.

  11. 47 CFR 27.1102 - Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands. 27.1102 Section 27.1102 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz,...

  12. 47 CFR 27.1002 - Designated entities in the 1915-1920 MHz and 1995-2000 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Designated entities in the 1915-1920 MHz and 1995-2000 MHz bands. 27.1002 Section 27.1002 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1915-1920 MHz and...

  13. 47 CFR 27.1102 - Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands. 27.1102 Section 27.1102 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz,...

  14. 47 CFR 27.1102 - Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands. 27.1102 Section 27.1102 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1695-1710 MHz,...

  15. 47 CFR 27.1002 - Designated entities in the 1915-1920 MHz and 1995-2000 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Designated entities in the 1915-1920 MHz and 1995-2000 MHz bands. 27.1002 Section 27.1002 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1915-1920 MHz and...

  16. 47 CFR 27.1102 - Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false Designated Entities in the 1710-1755 MHz and 2110-2155 MHz bands. 27.1102 Section 27.1102 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz,...

  17. 47 CFR 27.1104 - Designated Entities in the 2000-2020 MHz and 2180-2200 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Designated Entities in the 2000-2020 MHz and 2180-2200 MHz bands. 27.1104 Section 27.1104 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz,...

  18. 47 CFR 15.245 - Operation within the bands 902-928 MHz, 2435-2465 MHz, 5785-5815 MHz, 10500-10550 MHz, and 24075...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... limited to intentional radiators used as field disturbance sensors, excluding perimeter protection systems... field disturbance sensors operating in the 24075-24175 MHz band and for other field disturbance sensors... disturbance sensors, 7.5 mV/m. (iii) Field disturbance sensors designed to be used in motor vehicles...

  19. 47 CFR 15.245 - Operation within the bands 902-928 MHz, 2435-2465 MHz, 5785-5815 MHz, 10500-10550 MHz, and 24075...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... limited to intentional radiators used as field disturbance sensors, excluding perimeter protection systems... field disturbance sensors operating in the 24075-24175 MHz band and for other field disturbance sensors... disturbance sensors, 7.5 mV/m. (iii) Field disturbance sensors designed to be used in motor vehicles...

  20. 47 CFR 15.245 - Operation within the bands 902-928 MHz, 2435-2465 MHz, 5785-5815 MHz, 10500-10550 MHz, and 24075...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... limited to intentional radiators used as field disturbance sensors, excluding perimeter protection systems... field disturbance sensors operating in the 24075-24175 MHz band and for other field disturbance sensors... disturbance sensors, 7.5 mV/m. (iii) Field disturbance sensors designed to be used in motor vehicles...

  1. 47 CFR 15.245 - Operation within the bands 902-928 MHz, 2435-2465 MHz, 5785-5815 MHz, 10500-10550 MHz, and 24075...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... limited to intentional radiators used as field disturbance sensors, excluding perimeter protection systems... field disturbance sensors operating in the 24075-24175 MHz band and for other field disturbance sensors... disturbance sensors, 7.5 mV/m. (iii) Field disturbance sensors designed to be used in motor vehicles...

  2. 47 CFR 15.245 - Operation within the bands 902-928 MHz, 2435-2465 MHz, 5785-5815 MHz, 10500-10550 MHz, and 24075...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... limited to intentional radiators used as field disturbance sensors, excluding perimeter protection systems... field disturbance sensors operating in the 24075-24175 MHz band and for other field disturbance sensors... disturbance sensors, 7.5 mV/m. (iii) Field disturbance sensors designed to be used in motor vehicles...

  3. 47 CFR 27.1176 - Cost-sharing requirements for AWS in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... clearance of BRS incumbents from this spectrum, including BRS incumbents occupying the 2150-2162 MHz band on...-2160/62 MHz band. 27.1176 Section 27.1176 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... MHz, 1755-1780 MHz, 2110-2155 MHz, 2155-2180 MHz, 2180-2200 MHz Bands Cost-Sharing Policies...

  4. 47 CFR 27.501 - 746-763 MHz, 775-793 MHz, and 805-806 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false 746-763 MHz, 775-793 MHz, and 805-806 MHz bands subject to competitive bidding. 27.501 Section 27.501 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive...

  5. 47 CFR 27.501 - 746-763 MHz, 775-793 MHz, and 805-806 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false 746-763 MHz, 775-793 MHz, and 805-806 MHz bands subject to competitive bidding. 27.501 Section 27.501 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive...

  6. 47 CFR 27.501 - 746-758 MHz, 775-788 MHz, and 805-806 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false 746-758 MHz, 775-788 MHz, and 805-806 MHz bands subject to competitive bidding. 27.501 Section 27.501 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive...

  7. 47 CFR 27.501 - 746-763 MHz, 775-793 MHz, and 805-806 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false 746-763 MHz, 775-793 MHz, and 805-806 MHz bands subject to competitive bidding. 27.501 Section 27.501 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive...

  8. 47 CFR 27.501 - 746-763 MHz, 775-793 MHz, and 805-806 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false 746-763 MHz, 775-793 MHz, and 805-806 MHz bands subject to competitive bidding. 27.501 Section 27.501 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive...

  9. 47 CFR 90.259 - Assignment and use of frequencies in the bands 216-220 MHz and 1427-1432 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... performed in the 1427-1429 MHz and 1431.5-1432 MHz bands. The maximum ERP limitations are as follows...) For all other locations, primary operations are performed in the 1429.5-1432 MHz band. The maximum...

  10. 47 CFR 27.1300 - 600 MHz band subject to competitive bidding.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... licenses are subject to competitive bidding. The general competitive bidding procedures set forth in 47 CFR... SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 600 MHz Band § 27.1300 600 MHz band subject...

  11. 47 CFR 90.669 - Emission limits.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.669 Emission limits. (a) On any frequency in an MTA licensee's...

  12. 47 CFR 90.669 - Emission limits.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Mta-Based Smr Systems in the 896-901/935-940 Mhz Band § 90.669 Emission limits. (a) On any frequency in an MTA licensee's...

  13. Design concepts and performance of NASA X-band (7162 MHz/8415 MHz) transponder for deep-space spacecraft applications

    NASA Technical Reports Server (NTRS)

    Mysoor, N. R.; Perret, J. D.; Kermode, A. W.

    1991-01-01

    The design concepts and measured performance characteristics are summarized of an X band (7162 MHz/8415 MHz) breadboard deep space transponder (DSP) for future spacecraft applications, with the first use scheduled for the Comet Rendezvous Asteroid Flyby (CRAF) and Cassini missions in 1995 and 1996, respectively. The DST consists of a double conversion, superheterodyne, automatic phase tracking receiver, and an X band (8415 MHz) exciter to drive redundant downlink power amplifiers. The receiver acquires and coherently phase tracks the modulated or unmodulated X band (7162 MHz) uplink carrier signal. The exciter phase modulates the X band (8415 MHz) downlink signal with composite telemetry and ranging signals. The receiver measured tracking threshold, automatic gain control, static phase error, and phase jitter characteristics of the breadboard DST are in good agreement with the expected performance. The measured results show a receiver tracking threshold of -158 dBm and a dynamic signal range of 88 dB.

  14. 47 CFR 90.279 - Power limitations applicable to the 421-430 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Power limitations applicable to the 421-430 MHz... Bands § 90.279 Power limitations applicable to the 421-430 MHz band. (a) Base station authorizations in the 421-430 MHz band will be subject to Effective Radiated Power (ERP) and Effective Antenna...

  15. 47 CFR 90.279 - Power limitations applicable to the 421-430 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Power limitations applicable to the 421-430 MHz... Bands § 90.279 Power limitations applicable to the 421-430 MHz band. (a) Base station authorizations in the 421-430 MHz band will be subject to Effective Radiated Power (ERP) and Effective Antenna...

  16. 47 CFR 90.279 - Power limitations applicable to the 421-430 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Power limitations applicable to the 421-430 MHz... Bands § 90.279 Power limitations applicable to the 421-430 MHz band. (a) Base station authorizations in the 421-430 MHz band will be subject to Effective Radiated Power (ERP) and Effective Antenna...

  17. 47 CFR 90.279 - Power limitations applicable to the 421-430 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Power limitations applicable to the 421-430 MHz... Bands § 90.279 Power limitations applicable to the 421-430 MHz band. (a) Base station authorizations in the 421-430 MHz band will be subject to Effective Radiated Power (ERP) and Effective Antenna...

  18. 47 CFR 90.279 - Power limitations applicable to the 421-430 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Power limitations applicable to the 421-430 MHz... Bands § 90.279 Power limitations applicable to the 421-430 MHz band. (a) Base station authorizations in the 421-430 MHz band will be subject to Effective Radiated Power (ERP) and Effective Antenna...

  19. 47 CFR 27.1176 - Cost-sharing requirements for AWS in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...-2160/62 MHz band. 27.1176 Section 27.1176 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... MHz, 2160-2180 MHz Bands Cost-Sharing Policies Governing Broadband Radio Service Relocation from the 2150-2160/62 Mhz Band § 27.1176 Cost-sharing requirements for AWS in the 2150-2160/62 MHz band....

  20. 47 CFR 27.1176 - Cost-sharing requirements for AWS in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...-2160/62 MHz band. 27.1176 Section 27.1176 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... MHz, 2160-2180 MHz Bands Cost-Sharing Policies Governing Broadband Radio Service Relocation from the 2150-2160/62 Mhz Band § 27.1176 Cost-sharing requirements for AWS in the 2150-2160/62 MHz band....

  1. 47 CFR 27.1176 - Cost-sharing requirements for AWS in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...-2160/62 MHz band. 27.1176 Section 27.1176 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... MHz, 2160-2180 MHz Bands Cost-Sharing Policies Governing Broadband Radio Service Relocation from the 2150-2160/62 Mhz Band § 27.1176 Cost-sharing requirements for AWS in the 2150-2160/62 MHz band....

  2. 47 CFR 27.17 - Discontinuance of service in the 2000-2020 MHz and 2180-2200 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Discontinuance of service in the 2000-2020 MHz and 2180-2200 MHz bands. 27.17 Section 27.17 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Applications and...

  3. 47 CFR 27.1176 - Cost-sharing requirements for AWS in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... from this spectrum, including BRS incumbents occupying the 2150-2162 MHz band on a primary basis, must...-2160/62 MHz band. 27.1176 Section 27.1176 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... MHz, 2000-2020 MHz, and 2180-2200 MHz bands Cost-Sharing Policies Governing Broadband Radio...

  4. 47 CFR 15.323 - Specific requirements for devices operating in the 1920-1930 MHz sub-band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... the 1920-1930 MHz sub-band. 15.323 Section 15.323 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... requirements for devices operating in the 1920-1930 MHz sub-band. (a) Operation shall be contained within the 1920-1930 MHz band. The emission bandwidth shall be less then 2.5 MHz. The power level shall be...

  5. 47 CFR 15.323 - Specific requirements for devices operating in the 1920-1930 MHz sub-band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the 1920-1930 MHz sub-band. 15.323 Section 15.323 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... requirements for devices operating in the 1920-1930 MHz sub-band. (a) Operation shall be contained within the 1920-1930 MHz band. The emission bandwidth shall be less then 2.5 MHz. The power level shall be...

  6. 47 CFR 27.1301 - Designated entities in the 600 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Designated entities in the 600 MHz band. 27.1301 Section 27.1301 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 600 MHz Band § 27.1301 Designated entities in...

  7. 47 CFR 95.627 - MedRadio transmitters in the 401-406 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false MedRadio transmitters in the 401-406 MHz band... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Technical Regulations Technical Standards § 95.627 MedRadio transmitters in the 401-406 MHz band. The following provisions apply only to MedRadio transmitters operating...

  8. 47 CFR 95.627 - MedRadio transmitters in the 401-406 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false MedRadio transmitters in the 401-406 MHz band... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Technical Regulations Technical Standards § 95.627 MedRadio transmitters in the 401-406 MHz band. The following provisions apply only to MedRadio transmitters operating...

  9. 47 CFR 15.242 - Operation in the bands 174-216 MHz and 470-668 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... of any of the other radio astronomy observatories noted in footnote US385 of Section 2.106 of this... astronomy observatory before the equipment can be installed or operated. The National Science Foundation... mobile stations operating under part 90 of this chapter in the 470-512 MHz band, and radio...

  10. 47 CFR 15.242 - Operation in the bands 174-216 MHz and 470-668 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... of any of the other radio astronomy observatories noted in footnote US 311 of Section 2.106 of this... astronomy observatory before the equipment can be installed or operated. The National Science Foundation... mobile stations operating under part 90 of this chapter in the 470-512 MHz band, and radio...

  11. 47 CFR 15.242 - Operation in the bands 174-216 MHz and 470-668 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... of any of the other radio astronomy observatories noted in footnote US385 of Section 2.106 of this... astronomy observatory before the equipment can be installed or operated. The National Science Foundation... mobile stations operating under part 90 of this chapter in the 470-512 MHz band, and radio...

  12. 47 CFR 15.242 - Operation in the bands 174-216 MHz and 470-668 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... of any of the other radio astronomy observatories noted in footnote US 311 of Section 2.106 of this... astronomy observatory before the equipment can be installed or operated. The National Science Foundation... mobile stations operating under part 90 of this chapter in the 470-512 MHz band, and radio...

  13. 47 CFR 15.242 - Operation in the bands 174-216 MHz and 470-668 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... of any of the other radio astronomy observatories noted in footnote US 311 of Section 2.106 of this... astronomy observatory before the equipment can be installed or operated. The National Science Foundation... mobile stations operating under part 90 of this chapter in the 470-512 MHz band, and radio...

  14. 47 CFR 101.69 - Transition of the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands from the fixed microwave...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., and 2160-2200 MHz bands from the fixed microwave services to personal communications services and emerging technologies. 101.69 Section 101.69 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED... been allocated for use by emerging technology (ET) services, including Personal Communications...

  15. 47 CFR 101.69 - Transition of the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands from the fixed microwave...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., and 2160-2200 MHz bands from the fixed microwave services to personal communications services and emerging technologies. 101.69 Section 101.69 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED... been allocated for use by emerging technology (ET) services, including Personal Communications...

  16. 47 CFR 101.69 - Transition of the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands from the fixed microwave...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., and 2160-2200 MHz bands from the fixed microwave services to personal communications services and emerging technologies. 101.69 Section 101.69 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED... been allocated for use by emerging technology (ET) services, including Personal Communications...

  17. 47 CFR 101.69 - Transition of the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands from the fixed microwave...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., and 2160-2200 MHz bands from the fixed microwave services to personal communications services and emerging technologies. 101.69 Section 101.69 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED... been allocated for use by emerging technology (ET) services, including Personal Communications...

  18. 47 CFR 101.69 - Transition of the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands from the fixed microwave...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., and 2160-2200 MHz bands from the fixed microwave services to personal communications services and emerging technologies. 101.69 Section 101.69 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED... been allocated for use by emerging technology (ET) services, including Personal Communications...

  19. 75 FR 33220 - Unlicensed Personal Communications Services Devices in the 1920-1930 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-11

    ... operating in the 1920-1930 MHz band (known as the UPCS band) to make more efficient use of this spectrum... UPCS band) to make more efficient use of this spectrum. The Commission takes this action in response to... more efficient use of the UPCS-band spectrum. Therefore, it proposes to modify the UPCS Rules as...

  20. DSN 64-meter antenna L-band (1668-MHz) microwave system performance overview

    NASA Technical Reports Server (NTRS)

    Withington, J.

    1988-01-01

    In 1985, L-band (1668 MHz) receive-only feed systems were installed on the three Deep Space Network 64 meter antennas to provide tracking support for two non-NASA spacecraft. The specifications, design approach, and operational test results are presented. The L-band microwave system met all of its tracking goals and is currently being upgraded to include a C-band (5000 MHz) uplink.

  1. 47 CFR 90.357 - Frequencies for LMS systems in the 902-928 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Frequencies for LMS systems in the 902-928 MHz... SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Intelligent Transportation Systems Radio Service § 90.357 Frequencies for LMS systems in the 902-928 MHz band. (a) Multilateration LMS systems will...

  2. 78 FR 42701 - Improving Public Safety Communications in the 800 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-17

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Part 90 Improving Public Safety Communications in the 800 MHz Band AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: In this document, the Federal Communications...

  3. 76 FR 62309 - Implementing a Nationwide, Broadband, Interoperable Public Safety Network in the 700 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-07

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Chapter I Implementing a Nationwide, Broadband, Interoperable Public Safety Network in the 700 MHz Band AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: In this...

  4. 47 CFR 15.247 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... seconds within a 20 second period; if the 20 dB bandwidth of the hopping channel is 250 kHz or greater... frequency shall not be greater than 0.4 seconds within a 10 second period. The maximum allowed 20 dB... second period. (iii) Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15...

  5. 78 FR 23855 - Improving Public Safety Communications in the 800 MHz Band; New 800 MHz Band Plan for U.S.-Mexico...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-23

    ... for the National Public Safety Planning Advisory Committee (NPCPAC) Regions bordering Mexico, 77 FR...: This document establishes a reconfigured 800 MHz band plan for the National Public Safety Planning Advisory Committee Regions bordering Mexico. This action is necessary to meet the Commission's goals...

  6. 47 CFR 27.1136 - Protection of mobile satellite services in the 2000-2020 MHz and 2180-2200 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Protection of mobile satellite services in the... Protection of mobile satellite services in the 2000-2020 MHz and 2180-2200 MHz bands. An AWS licensee of the... satellite service operations in these bands. Any such AWS licensees must protect mobile satellite...

  7. 47 CFR 27.1136 - Protection of mobile satellite services in the 2000-2020 MHz and 2180-2200 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Protection of mobile satellite services in the... Operations § 27.1136 Protection of mobile satellite services in the 2000-2020 MHz and 2180-2200 MHz bands. An... duly authorized mobile satellite service operations in these bands. Any such AWS licensees must...

  8. 47 CFR 101.82 - Reimbursement and relocation expenses in the 2110-2150 MHz and 2160-2200 MHz bands.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses... microwave link with one path in the 2130-2150 MHz band and the paired path in the 2180-2200 MHz band, the... to relocate the same fixed microwave link as set forth in paragraphs (c) and (d) of this section....

  9. 47 CFR 101.82 - Reimbursement and relocation expenses in the 2110-2150 MHz and 2160-2200 MHz bands.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses... microwave link with one path in the 2130-2150 MHz band and the paired path in the 2180-2200 MHz band, the... to relocate the same fixed microwave link as set forth in paragraphs (c) and (d) of this section....

  10. 47 CFR 15.243 - Operation in the band 890-940 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Operation in the band 890-940 MHz. 15.243 Section 15.243 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.243 Operation in the band...

  11. 47 CFR 15.223 - Operation in the band 1.705-10 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Operation in the band 1.705-10 MHz. 15.223 Section 15.223 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.223 Operation in the band...

  12. 47 CFR 15.223 - Operation in the band 1.705-10 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Operation in the band 1.705-10 MHz. 15.223 Section 15.223 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.223 Operation in the band...

  13. 47 CFR 15.239 - Operation in the band 88-108 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.239 Operation in the band 88-108 MHz. (a) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered... the general radiated emission limits in § 15.209. (d) A custom built telemetry intentional...

  14. 47 CFR 15.241 - Operation in the band 174-216 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Operation in the band 174-216 MHz. 15.241 Section 15.241 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.241 Operation in the band...

  15. 47 CFR 15.227 - Operation within the band 26.96-27.28 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Operation within the band 26.96-27.28 MHz. 15.227 Section 15.227 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.227 Operation within the band...

  16. 47 CFR 15.225 - Operation within the band 13.110-14.010 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Operation within the band 13.110-14.010 MHz. 15.225 Section 15.225 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.225 Operation within the band...

  17. 47 CFR 15.229 - Operation within the band 40.66-40.70 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Operation within the band 40.66-40.70 MHz. 15.229 Section 15.229 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.229 Operation within the band...

  18. 47 CFR 15.239 - Operation in the band 88-108 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.239 Operation in the band 88-108 MHz. (a) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered... the general radiated emission limits in § 15.209. (d) A custom built telemetry intentional...

  19. 47 CFR 15.225 - Operation within the band 13.110-14.010 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Operation within the band 13.110-14.010 MHz. 15.225 Section 15.225 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.225 Operation within the band...

  20. 47 CFR 15.241 - Operation in the band 174-216 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Operation in the band 174-216 MHz. 15.241 Section 15.241 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.241 Operation in the band...

  1. 47 CFR 15.227 - Operation within the band 26.96-27.28 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Operation within the band 26.96-27.28 MHz. 15.227 Section 15.227 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.227 Operation within the band...

  2. 47 CFR 15.225 - Operation within the band 13.110-14.010 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Operation within the band 13.110-14.010 MHz. 15.225 Section 15.225 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.225 Operation within the band...

  3. 47 CFR 15.240 - Operation in the band 433.5-434.5 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Operation in the band 433.5-434.5 MHz. 15.240 Section 15.240 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.240 Operation in the band...

  4. 47 CFR 15.240 - Operation in the band 433.5-434.5 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Operation in the band 433.5-434.5 MHz. 15.240 Section 15.240 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.240 Operation in the band...

  5. 47 CFR 15.229 - Operation within the band 40.66-40.70 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Operation within the band 40.66-40.70 MHz. 15.229 Section 15.229 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.229 Operation within the band...

  6. 47 CFR 15.223 - Operation in the band 1.705-10 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Operation in the band 1.705-10 MHz. 15.223 Section 15.223 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.223 Operation in the band...

  7. 47 CFR 15.227 - Operation within the band 26.96-27.28 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Operation within the band 26.96-27.28 MHz. 15.227 Section 15.227 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.227 Operation within the band...

  8. 47 CFR 15.241 - Operation in the band 174-216 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Operation in the band 174-216 MHz. 15.241 Section 15.241 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.241 Operation in the band...

  9. 47 CFR 15.240 - Operation in the band 433.5-434.5 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Operation in the band 433.5-434.5 MHz. 15.240 Section 15.240 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.240 Operation in the band...

  10. 47 CFR 15.223 - Operation in the band 1.705-10 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Operation in the band 1.705-10 MHz. 15.223 Section 15.223 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.223 Operation in the band...

  11. 47 CFR 15.239 - Operation in the band 88-108 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.239 Operation in the band 88-108 MHz. (a) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered... the general radiated emission limits in § 15.209. (d) A custom built telemetry intentional...

  12. 47 CFR 15.229 - Operation within the band 40.66-40.70 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Operation within the band 40.66-40.70 MHz. 15.229 Section 15.229 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.229 Operation within the band...

  13. 47 CFR 15.241 - Operation in the band 174-216 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Operation in the band 174-216 MHz. 15.241 Section 15.241 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.241 Operation in the band...

  14. 47 CFR 15.223 - Operation in the band 1.705-10 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Operation in the band 1.705-10 MHz. 15.223 Section 15.223 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.223 Operation in the band...

  15. 47 CFR 15.243 - Operation in the band 890-940 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Operation in the band 890-940 MHz. 15.243 Section 15.243 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.243 Operation in the band...

  16. 47 CFR 15.243 - Operation in the band 890-940 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Operation in the band 890-940 MHz. 15.243 Section 15.243 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.243 Operation in the band...

  17. 47 CFR 15.225 - Operation within the band 13.110-14.010 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Operation within the band 13.110-14.010 MHz. 15.225 Section 15.225 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.225 Operation within the band...

  18. 47 CFR 15.229 - Operation within the band 40.66-40.70 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Operation within the band 40.66-40.70 MHz. 15.229 Section 15.229 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.229 Operation within the band...

  19. 47 CFR 15.227 - Operation within the band 26.96-27.28 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Operation within the band 26.96-27.28 MHz. 15.227 Section 15.227 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.227 Operation within the band...

  20. 47 CFR 15.241 - Operation in the band 174-216 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Operation in the band 174-216 MHz. 15.241 Section 15.241 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.241 Operation in the band...

  1. 47 CFR 15.239 - Operation in the band 88-108 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.239 Operation in the band 88-108 MHz. (a) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered... the general radiated emission limits in § 15.209. (d) A custom built telemetry intentional...

  2. 47 CFR 15.227 - Operation within the band 26.96-27.28 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Operation within the band 26.96-27.28 MHz. 15.227 Section 15.227 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.227 Operation within the band...

  3. 47 CFR 15.239 - Operation in the band 88-108 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.239 Operation in the band 88-108 MHz. (a) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered... the general radiated emission limits in § 15.209. (d) A custom built telemetry intentional...

  4. 47 CFR 15.225 - Operation within the band 13.110-14.010 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Operation within the band 13.110-14.010 MHz. 15.225 Section 15.225 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.225 Operation within the band...

  5. 47 CFR 15.229 - Operation within the band 40.66-40.70 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Operation within the band 40.66-40.70 MHz. 15.229 Section 15.229 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.229 Operation within the band...

  6. 47 CFR 15.243 - Operation in the band 890-940 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Operation in the band 890-940 MHz. 15.243 Section 15.243 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.243 Operation in the band...

  7. 47 CFR 15.240 - Operation in the band 433.5-434.5 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Operation in the band 433.5-434.5 MHz. 15.240 Section 15.240 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.240 Operation in the band...

  8. Occupancy of the radio frequency spectrum in the 16-23 MHz band

    NASA Technical Reports Server (NTRS)

    Ashkaliyev, Y. F.; Bocharov, V. I.

    1972-01-01

    Measurement results are presented for actual utilization of the short wave frequency band, obtained by continuous registration of the number of radio stations in the 16-23 MHz band over an annual cycle (1965). It is shown that there is a relation between the number of radio stations and the variations of MUF-F2. During years of minimum solar activity and at night, segments free of radio stations operating by normal reflection, can be selected in the 18-23-MHz band for ionospheric-scattering links.

  9. 75 FR 35363 - Improving Public Safety Communications in the 800 MHz Band; New 800 MHz Band Plan for Puerto Rico...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-22

    ... Filing of Documents in Rulemaking Proceedings, 63 FR 24121 (1998). Electronic Filers: Comments may be..., 69 FR 67823, November 22, 2004. In a Second Memorandum Opinion and Order, adopted in May 2007, the... markets, 72 FR 39756, July 20, 2007. Rather than specify a band plan for Puerto Rico, the...

  10. 47 CFR 27.77 - Restriction on mobile and portable equipment in the 1695-1710 MHz and 1755-1780 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Restriction on mobile and portable equipment in the 1695-1710 MHz and 1755-1780 MHz bands. 27.77 Section 27.77 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS...

  11. 47 CFR 27.201 - WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding. 27.201 Section 27.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES...

  12. 47 CFR 27.201 - WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding. 27.201 Section 27.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES...

  13. 47 CFR 27.201 - WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding. 27.201 Section 27.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES...

  14. 47 CFR 27.201 - WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding. 27.201 Section 27.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES...

  15. 47 CFR 27.201 - WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false WCS in the 2305-2320 MHz and 2345-2360 MHz bands subject to competitive bidding. 27.201 Section 27.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES...

  16. 47 CFR 15.323 - Specific requirements for devices operating in the 1920-1930 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... for the purpose of denying fair access to spectrum to other devices. (d) Emissions outside the band... the 1920-1930 MHz band. 15.323 Section 15.323 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... requirements for devices operating in the 1920-1930 MHz band. (a) Operation shall be contained within the...

  17. 47 CFR 15.323 - Specific requirements for devices operating in the 1920-1930 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... for the purpose of denying fair access to spectrum to other devices. (d) Emissions outside the band... the 1920-1930 MHz band. 15.323 Section 15.323 Telecommunication FEDERAL COMMUNICATIONS COMMISSION... requirements for devices operating in the 1920-1930 MHz band. (a) Operation shall be contained within the...

  18. 78 FR 48621 - Service Rules for Advanced Wireless Services in the 2000-2020 MHz and 2180-2200 MHz Bands, etc.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-09

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS... 2180-2200 MHz Bands, etc. AGENCY: Federal Communications Commission. ACTION: Final rule; announcement of effective date. SUMMARY: In this document, the Commission announces that the Office of...

  19. 47 CFR 15.250 - Operation of wideband systems within the band 5925-7250 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Operation of wideband systems within the band 5925-7250 MHz. 15.250 Section 15.250 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.250...

  20. 47 CFR 15.250 - Operation of wideband systems within the band 5925-7250 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Operation of wideband systems within the band 5925-7250 MHz. 15.250 Section 15.250 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.250...

  1. 47 CFR 15.250 - Operation of wideband systems within the band 5925-7250 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Operation of wideband systems within the band 5925-7250 MHz. 15.250 Section 15.250 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.250...

  2. 47 CFR 27.701 - 698-746 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false 698-746 MHz bands subject to competitive bidding. 27.701 Section 27.701 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive Bidding Procedures for the...

  3. 47 CFR 27.701 - 698-746 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false 698-746 MHz bands subject to competitive bidding. 27.701 Section 27.701 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive Bidding Procedures for the...

  4. 47 CFR 27.701 - 698-746 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false 698-746 MHz bands subject to competitive bidding. 27.701 Section 27.701 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive Bidding Procedures for the...

  5. 47 CFR 27.701 - 698-746 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false 698-746 MHz bands subject to competitive bidding. 27.701 Section 27.701 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive Bidding Procedures for the...

  6. 47 CFR 27.701 - 698-746 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false 698-746 MHz bands subject to competitive bidding. 27.701 Section 27.701 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Competitive Bidding Procedures for the...

  7. 47 CFR 90.717 - Channels available for nationwide systems in the 220-222 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Licensing and Use of Frequencies in the 220-222 MHz Band § 90.717 Channels available for nationwide systems in the 220-222 MHz band. (a) Channels 51-60, 81-90, and 141-150 are 10-channel blocks available to..., and 156-160 are 5-channel blocks available to non-Government applicants only for...

  8. 47 CFR 90.717 - Channels available for nationwide systems in the 220-222 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Licensing and Use of Frequencies in the 220-222 MHz Band § 90.717 Channels available for nationwide systems in the 220-222 MHz band. (a) Channels 51-60, 81-90, and 141-150 are 10-channel blocks available to..., and 156-160 are 5-channel blocks available to non-Government applicants only for...

  9. 76 FR 71909 - Service Rules for the 698-806 MHz Band, Revision of the Commission's Rules Regarding Public...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-21

    ...; FCC 07-132] Service Rules for the 698-806 MHz Band, Revision of the Commission's Rules Regarding Public Safety Spectrum Requirements, and a Declaratory Ruling on Reporting Requirement Under the... the Service Rules for the 698-806 MHz Band proceeding, to the extent they contained...

  10. 47 CFR 90.719 - Individual channels available for assignment in the 220-222 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Individual channels available for assignment in... Licensing and Use of Frequencies in the 220-222 MHz Band § 90.719 Individual channels available for assignment in the 220-222 MHz band. (a) Channels 171 through 200 are available to both Government and...

  11. 78 FR 77029 - Wireless Telecommunications Bureau Seeks Comment on a Proposal To License the 600 MHz Band Using...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-20

    ... 77 FR 69934 November 21, 2012 (NPRM), the Commission sought public comment on creating a 600 MHz band... MHz Bands 78 FR 51559 August 20, 2013 (AWS-3 NPRM), WTB seeks comment on applying this approach. 4. As... Electronic Comment Filing System (ECFS). See Electronic Filing of Documents in Rulemaking Proceedings, 63...

  12. 47 CFR 95.1223 - Registration and frequency coordination in the 2360-2390 MHz Band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... incorporated by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51 and approved by the Director of... MBAN is within the line of sight of an AMT receive facility in the 2360-2390 MHz band and notify the...) of this section. (1) If the MBAN is beyond the line of sight of an AMT receive facility, it...

  13. 47 CFR 95.1223 - Registration and frequency coordination in the 2360-2390 MHz Band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... incorporated by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51 and approved by the Director of... MBAN is within the line of sight of an AMT receive facility in the 2360-2390 MHz band and notify the...) of this section. (1) If the MBAN is beyond the line of sight of an AMT receive facility, it...

  14. 47 CFR 95.1223 - Registration and frequency coordination in the 2360-2390 MHz Band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... incorporated by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51 and approved by the Director of... MBAN is within the line of sight of an AMT receive facility in the 2360-2390 MHz band and notify the...) of this section. (1) If the MBAN is beyond the line of sight of an AMT receive facility, it...

  15. Type IIIb bursts and their fine structure in frequency band 18-30 MHz

    NASA Astrophysics Data System (ADS)

    Melnik, V. N.; Rucker, H. O.; Konovalenko, A. A.; Shevchuk, N. V.; Abranin, E. P.; Dorovskyy, V. V.; Lecacheux, A.

    2010-01-01

    This paper deals with Type IIIb bursts, which were observed in the frequency band from 18 to 30 MHz. These bursts have fine frequency structures contrary to usual Type III bursts. The main properties of Type IIIb bursts such as number of striae in a burst, their frequency drift rates, durations, frequency widths of stria, emission fluxes are presented. It is also shown that parameters of stria bursts depend on the position of active areas on the solar disk.

  16. 47 CFR 27.1103 - 2000-2020 MHz and 2180-2200 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz, 2110-2155... competitive bidding procedures set forth in 47 CFR part 1, subpart Q will apply unless otherwise provided...

  17. 47 CFR 27.1101 - 1710-1755 MHz and 2110-2155 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz, 2110-2155... competitive bidding procedures set forth in 47 CFR part 1, subpart Q will apply unless otherwise provided...

  18. 47 CFR 27.1101 - 1710-1755 MHz and 2110-2155 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz, 2110-2155... bidding procedures set forth in 47 CFR part 1, subpart Q will apply unless otherwise provided in...

  19. 47 CFR 27.1001 - 1915-1920 MHz and 1995-2000 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1915-1920 MHz and 1995... forth in 47 CFR part 1, subpart Q will apply unless otherwise provided in this subpart....

  20. 47 CFR 27.1001 - 1915-1920 MHz and 1995-2000 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1915-1920 MHz and 1995... forth in 47 CFR part 1, subpart Q will apply unless otherwise provided in this subpart....

  1. 47 CFR 27.1101 - 1710-1755 MHz and 2110-2155 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz, 2110-2155... bidding procedures set forth in 47 CFR part 1, subpart Q will apply unless otherwise provided in...

  2. 47 CFR 27.1101 - 1710-1755 MHz and 2110-2155 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1695-1710 MHz, 1710-1755... competitive bidding. The general competitive bidding procedures set forth in 47 CFR part 1, subpart Q...

  3. 47 CFR 27.1101 - 1710-1755 MHz and 2110-2155 MHz bands subject to competitive bidding.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz, 2110-2155... bidding procedures set forth in 47 CFR part 1, subpart Q will apply unless otherwise provided in...

  4. 47 CFR 90.259 - Assignment and use of frequencies in the bands 216-220 MHz and 1427-1432 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... power is 2 watts. The maximum antenna height above average terrain (HAAT) is 152 m (500 feet). (5) In... of Charles City, Chesterfield, Dinwiddie, Goochland, Hanover, Henrico, Isle of Wight, James City, New... locations, secondary operations are performed in the 1427-1429.5 MHz band. The maximum power is 1 watt...

  5. 47 CFR 90.259 - Assignment and use of frequencies in the bands 216-220 MHz and 1427-1432 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... power is 2 watts. The maximum antenna height above average terrain (HAAT) is 152 m (500 feet). (5) In... of Charles City, Chesterfield, Dinwiddie, Goochland, Hanover, Henrico, Isle of Wight, James City, New... locations, secondary operations are performed in the 1427-1429.5 MHz band. The maximum power is 1 watt...

  6. 47 CFR 90.259 - Assignment and use of frequencies in the bands 216-220 MHz and 1427-1432 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... power is 2 watts. The maximum antenna height above average terrain (HAAT) is 152 m (500 feet). (5) In... of Charles City, Chesterfield, Dinwiddie, Goochland, Hanover, Henrico, Isle of Wight, James City, New... locations, secondary operations are performed in the 1427-1429.5 MHz band. The maximum power is 1 watt...

  7. 47 CFR 90.259 - Assignment and use of frequencies in the bands 216-220 MHz and 1427-1432 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... power is 2 watts. The maximum antenna height above average terrain (HAAT) is 152 m (500 feet). (5) In... of Charles City, Chesterfield, Dinwiddie, Goochland, Hanover, Henrico, Isle of Wight, James City, New... locations, secondary operations are performed in the 1427-1429.5 MHz band. The maximum power is 1 watt...

  8. 47 CFR 101.82 - Reimbursement and relocation expenses in the 2110-2150 MHz and 2160-2200 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... between AWS and MSS (space-to-Earth downlink). Whenever an ET licensee (AWS or Mobile Satellite Service for space-to-Earth downlink in the 2130-2150 or 2180-2200 MHz bands) relocates an incumbent paired... section from any other AWS licensee or MSS space-to-Earth downlink operator which would have been...

  9. 47 CFR 101.82 - Reimbursement and relocation expenses in the 2110-2150 MHz and 2160-2200 MHz bands.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... between AWS and MSS (space-to-Earth downlink). Whenever an ET licensee (AWS or Mobile Satellite Service for space-to-Earth downlink in the 2130-2150 or 2180-2200 MHz bands) relocates an incumbent paired... section from any other AWS licensee or MSS space-to-Earth downlink operator which would have been...

  10. 47 CFR 101.82 - Reimbursement and relocation expenses in the 2110-2150 MHz and 2160-2200 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... between AWS and MSS (space-to-Earth downlink). Whenever an ET licensee (AWS or Mobile Satellite Service for space-to-Earth downlink in the 2130-2150 or 2180-2200 MHz bands) relocates an incumbent paired... section from any other AWS licensee or MSS space-to-Earth downlink operator which would have been...

  11. 47 CFR 27.1111 - Relocation of fixed microwave service licensees in the 2110-2150 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false Relocation of fixed microwave service licensees..., 2110-2155 MHz, 2160-2180 MHz Bands Relocation of Incumbents § 27.1111 Relocation of fixed microwave... contain provisions governing the relocation of incumbent fixed microwave service licensees in the...

  12. 47 CFR 27.1111 - Relocation of fixed microwave service licensees in the 2110-2150 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Relocation of fixed microwave service licensees..., 2110-2155 MHz, 2160-2180 MHz Bands Relocation of Incumbents § 27.1111 Relocation of fixed microwave... contain provisions governing the relocation of incumbent fixed microwave service licensees in the...

  13. 47 CFR 27.1111 - Relocation of fixed microwave service licensees in the 2110-2150 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false Relocation of fixed microwave service licensees..., 2110-2155 MHz, 2160-2180 MHz Bands Relocation of Incumbents § 27.1111 Relocation of fixed microwave... contain provisions governing the relocation of incumbent fixed microwave service licensees in the...

  14. 47 CFR 27.1132 - Protection of incumbent operations in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false Protection of incumbent operations in the 2150-2160/62 MHz band. 27.1132 Section 27.1132 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz,...

  15. 47 CFR 27.1132 - Protection of incumbent operations in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false Protection of incumbent operations in the 2150-2160/62 MHz band. 27.1132 Section 27.1132 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz,...

  16. 47 CFR 27.1132 - Protection of incumbent operations in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Protection of incumbent operations in the 2150-2160/62 MHz band. 27.1132 Section 27.1132 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1710-1755 MHz,...

  17. 78 FR 19424 - Service Rules for the 698-746, 747-762 and 777-792 MHz Bands; Revision of the Commission's Rules...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-01

    ... spectrum aggregation limits at the initial licensing stages of the 700 MHz Band. Further, the Commission...-792 MHz Bands; Revision of the Commission's Rules To Ensure Compatibility With Enhanced 911 Emergency..., relating to the 698-806 MHz Band, including decisions regarding performance requirements, the auction...

  18. 76 FR 1158 - Auction of 700 MHz Band Licenses Scheduled for July 19, 2011; Comment Sought on Competitive...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-07

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION Auction of 700 MHz Band Licenses Scheduled for July 19, 2011; Comment Sought on Competitive Bidding Procedures for Auction 92 AGENCY: Federal Communications Commission. ACTION: Notice. ]...

  19. Evaluation of a 433 MHz Band Body Sensor Network for Biomedical Applications

    PubMed Central

    Kim, Saim; Brendle, Christian; Lee, Hyun-Young; Walter, Marian; Gloeggler, Sigrid; Krueger, Stefan; Leonhardt, Steffen

    2013-01-01

    Body sensor networks (BSN) are an important research topic due to various advantages over conventional measurement equipment. One main advantage is the feasibility to deploy a BSN system for 24/7 health monitoring applications. The requirements for such an application are miniaturization of the network nodes and the use of wireless data transmission technologies to ensure wearability and ease of use. Therefore, the reliability of such a system depends on the quality of the wireless data transmission. At present, most BSNs use ZigBee or other IEEE 802.15.4 based transmission technologies. Here, we evaluated the performance of a wireless transmission system of a novel BSN for biomedical applications in the 433 MHz ISM band, called Integrated Posture and Activity NEtwork by Medit Aachen (IPANEMA) BSN. The 433 MHz ISM band is used mostly by implanted sensors and thus allows easy integration of such into the BSN. Multiple measurement scenarios have been assessed, including varying antenna orientations, transmission distances and the number of network participants. The mean packet loss rate (PLR) was 0.63% for a single slave, which is comparable to IEEE 802.15.4 BSNs in the proximity of Bluetooth or WiFi networks. Secondly, an enhanced version is evaluated during on-body measurements with five slaves. The mean PLR results show a comparable good performance for measurements on a treadmill (2.5%), an outdoor track (3.4%) and in a climate chamber (1.5%). PMID:23344383

  20. Evaluation of a 433 MHz band body sensor network for biomedical applications.

    PubMed

    Kim, Saim; Brendle, Christian; Lee, Hyun-Young; Walter, Marian; Gloeggler, Sigrid; Krueger, Stefan; Leonhardt, Steffen

    2013-01-01

    Body sensor networks (BSN) are an important research topic due to various advantages over conventional measurement equipment. One main advantage is the feasibility to deploy a BSN system for 24/7 health monitoring applications. The requirements for such an application are miniaturization of the network nodes and the use of wireless data transmission technologies to ensure wearability and ease of use. Therefore, the reliability of such a system depends on the quality of the wireless data transmission. At present, most BSNs use ZigBee or other IEEE 802.15.4 based transmission technologies. Here, we evaluated the performance of a wireless transmission system of a novel BSN for biomedical applications in the 433MHz ISM band, called Integrated Posture and Activity NEtwork by Medit Aachen (IPANEMA) BSN. The 433MHz ISM band is used mostly by implanted sensors and thus allows easy integration of such into the BSN. Multiple measurement scenarios have been assessed, including varying antenna orientations, transmission distances and the number of network participants. The mean packet loss rate (PLR) was 0.63% for a single slave, which is comparable to IEEE 802.15.4 BSNs in the proximity of Bluetooth or WiFi networks. Secondly, an enhanced version is evaluated during on-body measurements with five slaves. The mean PLR results show a comparable good performance for measurements on a treadmill (2.5%), an outdoor track (3.4%) and in a climate chamber (1.5%). PMID:23344383

  1. Techniques to minimize adjacent band emissions from Earth Exploration Satellites to protect the Space Research (Category B) Earth Stations in the 8400-8450 MHz band

    NASA Technical Reports Server (NTRS)

    Wang, Charles C.; Sue, Miles K.; Manshadi, Farzin

    2004-01-01

    The Earth Exploration Satellites operating in the 8025-8400 MHz band can have strong adjacent band emissions on the8400-8450 MHz band which is allocated for Space Research (Category-B). The unwanted emission may exceed the protection criterion establish by the ITU-R for the protection of the Space Research (Category B) earth stations, i.e., deep-space earth stations. An SFCG Action Item (SF 23/14) was created during the 23rd SFCG meeting to explore technical and operational techniques to reduce the adjacent band emissions. In response to this action item, a study was conducted and results are presented in this document.

  2. 47 CFR 15.247 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    .... (d) In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally... system that permits the system to recognize other users within the spectrum band so that it individually.... Note: Spread spectrum systems are sharing these bands on a noninterference basis with...

  3. 47 CFR 15.247 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    .... (d) In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally... system that permits the system to recognize other users within the spectrum band so that it individually.... Note: Spread spectrum systems are sharing these bands on a noninterference basis with...

  4. 47 CFR 90.687 - Special provisions regarding assignments and transfers of authorizations for incumbent SMR...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... transfers of authorizations for incumbent SMR licensees in the 809-824/854-869 MHz band. 90.687 Section 90..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.687 Special provisions regarding assignments and transfers...

  5. 47 CFR 90.687 - Special provisions regarding assignments and transfers of authorizations for incumbent SMR...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... transfers of authorizations for incumbent SMR licensees in the 809-824/854-869 MHz band. 90.687 Section 90..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.687 Special provisions regarding assignments and transfers...

  6. 47 CFR 90.687 - Special provisions regarding assignments and transfers of authorizations for incumbent SMR...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... transfers of authorizations for incumbent SMR licensees in the 809-824/854-869 MHz band. 90.687 Section 90..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.687 Special provisions regarding assignments and transfers...

  7. 47 CFR 90.687 - Special provisions regarding assignments and transfers of authorizations for incumbent SMR...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... transfers of authorizations for incumbent SMR licensees in the 809-824/854-869 MHz band. 90.687 Section 90..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.687 Special provisions regarding assignments and transfers...

  8. 76 FR 49364 - Fixed and Mobile Services in the Mobile Satellite Service Bands at 1525-1559 MHz and 1626.5-1660...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-10

    ..., published at 76 FR 31252, May 31, 2011. This is a summary of the Commission's document, Report No. 2932... COMMISSION 47 CFR Parts 1, 2, and 25 Fixed and Mobile Services in the Mobile Satellite Service Bands at 1525... Satellite Service Bands at 1525-1559 MHz and 1626.5-1660.5 MHz, 1610-1626.5 MHz and 2483.5-2500 MHz,...

  9. 47 CFR 15.237 - Operation in the bands 72.0-73.0 MHz, 74.6-74.8 MHz and 75.2-76.0 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15... radiator shall be restricted to use as an auditory assistance device. (b) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered on the operating frequency. The 200 kHz...

  10. 47 CFR 15.237 - Operation in the bands 72.0-73.0 MHz, 74.6-74.8 MHz and 75.2-76.0 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15... radiator shall be restricted to use as an auditory assistance device. (b) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered on the operating frequency. The 200 kHz...

  11. 47 CFR 15.237 - Operation in the bands 72.0-73.0 MHz, 74.6-74.8 MHz and 75.2-76.0 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15... radiator shall be restricted to use as an auditory assistance device. (b) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered on the operating frequency. The 200 kHz...

  12. 47 CFR 15.237 - Operation in the bands 72.0-73.0 MHz, 74.6-74.8 MHz and 75.2-76.0 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15... radiator shall be restricted to use as an auditory assistance device. (b) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered on the operating frequency. The 200 kHz...

  13. 47 CFR 15.237 - Operation in the bands 72.0-73.0 MHz, 74.6-74.8 MHz and 75.2-76.0 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15... radiator shall be restricted to use as an auditory assistance device. (b) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered on the operating frequency. The 200 kHz...

  14. 47 CFR 15.247 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... operator of the spread spectrum or digitally modulated intentional radiator or, if the equipment is.... (d) In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally... density requirements of paragraph (d) of this section. (g) Frequency hopping spread spectrum systems...

  15. 47 CFR 25.147 - Licensing provision for NGSO MSS feeder downlinks in the band 6700-6875 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space... MSS satellite transmitting in the band 6700-6875 MHz causes harmful interference to previously licensed co-frequency Public Safety facilities, then that satellite licensee is obligated to remedy...

  16. 47 CFR 25.147 - Licensing provision for NGSO MSS feeder downlinks in the band 6700-6875 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space... MSS satellite transmitting in the band 6700-6875 MHz causes harmful interference to previously licensed co-frequency Public Safety facilities, then that satellite licensee is obligated to remedy...

  17. 47 CFR 25.147 - Licensing provision for NGSO MSS feeder downlinks in the band 6700-6875 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space... MSS satellite transmitting in the band 6700-6875 MHz causes harmful interference to previously licensed co-frequency Public Safety facilities, then that satellite licensee is obligated to remedy...

  18. 47 CFR 25.147 - Licensing provision for NGSO MSS feeder downlinks in the band 6700-6875 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space... MSS satellite transmitting in the band 6700-6875 MHz causes harmful interference to previously licensed co-frequency Public Safety facilities, then that satellite licensee is obligated to remedy...

  19. 47 CFR 25.147 - Licensing provision for NGSO MSS feeder downlinks in the band 6700-6875 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space... MSS satellite transmitting in the band 6700-6875 MHz causes harmful interference to previously licensed co-frequency Public Safety facilities, then that satellite licensee is obligated to remedy...

  20. 47 CFR 101.149 - Special requirements for operation in the band 38,600-40,000 MHz

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Special requirements for operation in the band 38,600-40,000 MHz 101.149 Section 101.149 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101.149...

  1. 47 CFR 101.149 - Special requirements for operation in the band 38,600-40,000 MHz

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Special requirements for operation in the band 38,600-40,000 MHz 101.149 Section 101.149 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101.149...

  2. 47 CFR 101.149 - Special requirements for operation in the band 38,600-40,000 MHz

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Special requirements for operation in the band 38,600-40,000 MHz 101.149 Section 101.149 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101.149...

  3. 47 CFR 101.149 - Special requirements for operation in the band 38,600-40,000 MHz

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Special requirements for operation in the band 38,600-40,000 MHz 101.149 Section 101.149 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101.149...

  4. 47 CFR 101.149 - Special requirements for operation in the band 38,600-40,000 MHz

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Special requirements for operation in the band 38,600-40,000 MHz 101.149 Section 101.149 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101.149...

  5. 47 CFR 27.1111 - Relocation of fixed microwave service licensees in the 2110-2150 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Relocation of fixed microwave service licensees... fixed microwave service licensees in the 2110-2150 MHz band. Part 22, subpart E and part 101, subpart B of this chapter contain provisions governing the relocation of incumbent fixed microwave...

  6. 47 CFR 90.699 - Transition of the upper 200 channels in the 800 MHz band to EA licensing.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Transition of the upper 200 channels in the 800 MHz band to EA licensing. 90.699 Section 90.699 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing Licensing and Use of Frequencies in the...

  7. 47 CFR 90.257 - Assignment and use of frequencies in the band 72-76 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...) Radio remote control of models is permitted on frequencies 10 kHz removed from these frequencies authorized for fixed and mobile operations in the 72-76 MHz band. Remote control operations are secondary to... otherwise, to use other available frequencies. (iii) The applicant has a plan to control any...

  8. 76 FR 31252 - Fixed and Mobile Services in the Mobile Satellite Service Bands at 1525-1559 MHz and 1626.5-1660...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-31

    ....5-2500 MHz, and the L-band from 1525-1559 MHz and 1626.5-1660.5 MHz. 75 FR 49871 (August 16, 2010... capability to serve important needs, such as rural access and disaster recovery. 75 FR 49871 (August 16, 2010... then provide wireless services consistent with the underlying license authorization. 68 FR...

  9. 47 CFR 27.1111 - Relocation of fixed microwave service licensees in the 2110-2150 and 2160-2200 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Relocation of fixed microwave service licensees... Incumbents § 27.1111 Relocation of fixed microwave service licensees in the 2110-2150 and 2160-2200 MHz bands... of incumbent fixed microwave service licensees in the 2110-2150 MHz and 2160-2200 MHz...

  10. The 2002 Leonids Using 28 MHz Ham-band Radio Observations (HRO) over = Japan

    NASA Astrophysics Data System (ADS)

    Usui, T.; Ogawa, H.; Hashimoto, T.; Ohnishi, K.; Yaguchi, N.; = Maegawa, K.

    2002-12-01

    The 2002 Leonids were expected to present a spectacular appearance = over Europe and America. No spectacular appearance was expected in Japan. On = the evening of November 17 (UT), however, the 1965 dust trail was predicted = to approach the Earth closely. Therefore, Japanese observers tried to = detect this trail using 28 MHz radio. This is because 28 MHz observations can = detect fainter meteor echoes than 53 MHz observations which are prevalent in Japan. = This study shows the observing method and results of 28 MHz observations of the = 2002 Leonids. We found that the Leonids were detectable for longer at 28 MHz than at = 53.75 MHz. This indicates that the distribution of fainter (smaller) meteors is = wider than that of larger ones.

  11. 47 CFR 27.19 - Requirements for operation of base and fixed stations in the 600 MHz downlink band in close...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... stations in the 600 MHz downlink band in close proximity to Radio Astronomy Observatories. 27.19 Section 27... base and fixed stations in the 600 MHz downlink band in close proximity to Radio Astronomy Observatories. (a) Licensees must make reasonable efforts to protect the radio astronomy observatory at...

  12. 47 CFR 90.685 - Authorization, construction and implementation of EA licenses.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Use of Frequencies in the 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the... licensees in Channel blocks A, B and C in the 816-821/861-866 MHz band to construct 50 percent of the total channels included in their spectrum block in at least one location in their respective EA-based...

  13. Sharing the 620-790 MHz band allocated to terrestrial television with an audio-bandwidth social service satellite system

    NASA Technical Reports Server (NTRS)

    Smith, E. K.; Reinhart, E. E.

    1977-01-01

    A study was carried out to identify the optimum uplink and downlink frequencies for audio-bandwidth channels for use by a satellite system distributing social services. The study considered functional-user-need models for five types of social services and identified a general baseline system that is appropriate for most of them. Technical aspects and costs of this system and of the frequency bands that it might use were reviewed, leading to the identification of the 620-790 MHz band as a perferred candidate for both uplink and downlink transmissions for nonmobile applications. The study also led to some ideas as to how to configure the satellite system.

  14. 78 FR 1188 - Commercial Operations in the 3550-3650 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-08

    ... Citizens Broadband Radio Service under part 95 of its rules for shared small cell use in the 3550-3650 MHz... Satellite Service (FSS) users. The Commission also seeks comment on how the unique characteristics of small cells may help reduce the need for geographic protections and enable shared access of the 3.5 GHz...

  15. Bandwidth Efficient Modulation and Coding Techniques for NASA's Existing Ku/Ka-Band 225 MHz Wide Service

    NASA Technical Reports Server (NTRS)

    Gioannini, Bryan; Wong, Yen; Wesdock, John

    2005-01-01

    The National Aeronautics and Space Administration (NASA) has recently established the Tracking and Data Relay Satellite System (TDRSS) K-band Upgrade Project (TKUP), a project intended to enhance the TDRSS Ku-band and Ka-band Single Access Return 225 MHz (Ku/KaSAR-225) data service by adding the capability to process bandwidth efficient signal design and to replace the White Sand Complex (WSC) KSAR high data rate ground equipment and high rate switches which are nearing obsolescence. As a precursor to this project, a modulation and coding study was performed to identify signal structures which maximized the data rate through the Ku/KaSAR-225 channel, minimized the required customer EIRP and ensured acceptable hardware complexity on the customer platform. This paper presents the results and conclusions of the TKUP modulation and coding study.

  16. 47 CFR 15.243 - Operation in the band 890-940 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... frequency energy to measure the characteristics of a material. Devices operated pursuant to the provisions... message. (b) The field strength of any emissions radiated within the specified frequency band shall not...) The field strength of emissions radiated on any frequency outside of the specified band shall...

  17. Allocation of spectrum in a certain MHz band and to establish other rules, policies, and procedures for one-way paging stations in the Domestic Public Land Mobile Radio Service--Federal Communications Commission. Final rule.

    PubMed

    1982-06-01

    This First Report and Order allocates 3 MHz of spectrum for paging services in the 929-932 MHz band. Private paging services will use frequency band 929-930 MHz, common carrier services will use frequency band 931-932 MHz, with a flexible boundary between the two bands effective after five years. The 930-931 MHz band will be reserved for advanced technology paging systems. This allocation was made in response to petitions filed by the Ad Hoc Private Paging Committee and Telocator Network of America. These new paging frequencies will allow for substantial growth of the paging industry, which has been restricted by a shortage of frequencies.

  18. An Optimum Model to Estimate Path Losses for 400 MHz Band Land Mobile Radio

    NASA Astrophysics Data System (ADS)

    Miyashita, Michifumi; Terada, Takashi; Serizawa, Yoshizumi

    It is difficult to estimate path loss for land mobile radio using a single path loss model such as diffraction model or Okumura model individually when mobile radio is utilized in widespread area. Furthermore, high accuracy of the path loss estimation is needed when the radio system is digitized because degradation of CNR due to interference deteriorates communications. In this paper, conventional path loss models, i.e. the diffraction model, Okumura model and two-ray model, were evaluated with 400 MHz land mobile radio field measurements, and a method of improving path loss estimation by using each of these conventional models selectively was proposed. The ratio of error between -10 dB and +10 dB for the method applying the correction factors derived from our field measurements was 71.41 %, while the ratios for the conventional diffraction and Okumura models without any correction factors were 26.71 % and 49.42 %, respectively.

  19. 47 CFR 90.315 - Special provisions governing use of frequencies in the 476-494 MHz band (TV Channels 15, 16, 17...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... in the 476-494 MHz band (TV Channels 15, 16, 17) in the Southern Louisiana-Texas Offshore Zone. 90..., 17) in the Southern Louisiana-Texas Offshore Zone. (a) The frequency bands from 490-491 and 493-494... Stations by Offshore Stations Operating in the Southern Louisiana-Texas Offshore Zone (65 dB...

  20. 47 CFR 90.315 - Special provisions governing use of frequencies in the 476-494 MHz band (TV Channels 15, 16, 17...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... in the 476-494 MHz band (TV Channels 15, 16, 17) in the Southern Louisiana-Texas Offshore Zone. 90..., 17) in the Southern Louisiana-Texas Offshore Zone. (a) The frequency bands from 490-491 and 493-494... Stations by Offshore Stations Operating in the Southern Louisiana-Texas Offshore Zone (65 dB...

  1. 47 CFR 90.315 - Special provisions governing use of frequencies in the 476-494 MHz band (TV Channels 15, 16, 17...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... in the 476-494 MHz band (TV Channels 15, 16, 17) in the Southern Louisiana-Texas Offshore Zone. 90..., 17) in the Southern Louisiana-Texas Offshore Zone. (a) The frequency bands from 490-491 and 493-494... Stations by Offshore Stations Operating in the Southern Louisiana-Texas Offshore Zone (65 dB...

  2. 47 CFR 90.315 - Special provisions governing use of frequencies in the 476-494 MHz band (TV Channels 15, 16, 17...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... in the 476-494 MHz band (TV Channels 15, 16, 17) in the Southern Louisiana-Texas Offshore Zone. 90..., 17) in the Southern Louisiana-Texas Offshore Zone. (a) The frequency bands from 490-491 and 493-494... Stations by Offshore Stations Operating in the Southern Louisiana-Texas Offshore Zone (65 dB...

  3. 47 CFR 90.261 - Assignment and use of the frequencies in the band 450-470 MHz for fixed operations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Assignment and use of the frequencies in the band 450-470 MHz for fixed operations. 90.261 Section 90.261 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Standards for Special Frequencies or Frequency Bands...

  4. 78 FR 16827 - Commercial Operations in the 3550-3650 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-19

    ... the NPRM, the Wireless Telecommunications Bureau and Office of Engineering and Technology announced... workshop will focus on small cell technology ``in the context of the 3.5 GHz Band as well as database and... From the Federal Register Online via the Government Publishing Office FEDERAL...

  5. 47 CFR 15.235 - Operation within the band 49.82-49.90 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.235 Operation within the band 49.82... for certification. (c) For a home-built intentional radiator, as defined in § 15.23(a), operating... part apply to intentional radiators constructed under the provisions of this paragraph. (d)...

  6. 47 CFR 15.235 - Operation within the band 49.82-49.90 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.235 Operation within the band 49.82... for certification. (c) For a home-built intentional radiator, as defined in § 15.23(a), operating... part apply to intentional radiators constructed under the provisions of this paragraph. (d)...

  7. 47 CFR 15.235 - Operation within the band 49.82-49.90 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.235 Operation within the band 49.82... for certification. (c) For a home-built intentional radiator, as defined in § 15.23(a), operating... part apply to intentional radiators constructed under the provisions of this paragraph. (d)...

  8. 47 CFR 15.235 - Operation within the band 49.82-49.90 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.235 Operation within the band 49.82... for certification. (c) For a home-built intentional radiator, as defined in § 15.23(a), operating... part apply to intentional radiators constructed under the provisions of this paragraph. (d)...

  9. 47 CFR 15.235 - Operation within the band 49.82-49.90 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.235 Operation within the band 49.82... for certification. (c) For a home-built intentional radiator, as defined in § 15.23(a), operating... part apply to intentional radiators constructed under the provisions of this paragraph. (d)...

  10. 47 CFR 90.669 - Emission limits.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 896-901/935-940 Mhz Band § 90.669 Emission limits. (a) On any frequency in an MTA licensee's spectrum block that is adjacent to a non-MTA frequency, the power of any emission shall be attenuated below the... MOBILE RADIO SERVICES Regulations Governing Licensing and Use of Frequencies in the 806-824, 851-869,...

  11. 47 CFR 90.665 - Authorization, construction and implementation of MTA licenses.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Use of Frequencies in the 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the... block, including any stations that may have been subject to an earlier construction deadline arising... extent to which incumbent licensees are present within the MTA block. (d) MTA licensees who fail to...

  12. 47 CFR 90.669 - Emission limits.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Emission limits. 90.669 Section 90.669... 896-901/935-940 Mhz Band § 90.669 Emission limits. (a) On any frequency in an MTA licensee's spectrum block that is adjacent to a non-MTA frequency, the power of any emission shall be attenuated below...

  13. 47 CFR 90.669 - Emission limits.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Emission limits. 90.669 Section 90.669... 896-901/935-940 Mhz Band § 90.669 Emission limits. (a) On any frequency in an MTA licensee's spectrum block that is adjacent to a non-MTA frequency, the power of any emission shall be attenuated below...

  14. 47 CFR 90.605 - Forms to be used.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Forms to be used. 90.605 Section 90.605...-901, and 935-940 MHz Bands Application for Authorizations § 90.605 Forms to be used. Applications for conventional and trunked radio facilities must be prepared on FCC Form 601 and must be submitted or filed...

  15. 47 CFR 90.605 - Forms to be used.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Forms to be used. 90.605 Section 90.605...-901, and 935-940 MHz Bands Application for Authorizations § 90.605 Forms to be used. Applications for conventional and trunked radio facilities must be prepared on FCC Form 601 and must be submitted or filed...

  16. 47 CFR 90.605 - Forms to be used.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Forms to be used. 90.605 Section 90.605...-901, and 935-940 MHz Bands Application for Authorizations § 90.605 Forms to be used. Applications for conventional and trunked radio facilities must be prepared on FCC Form 601 and must be submitted or filed...

  17. 47 CFR 90.605 - Forms to be used.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Forms to be used. 90.605 Section 90.605...-901, and 935-940 MHz Bands Application for Authorizations § 90.605 Forms to be used. Applications for conventional and trunked radio facilities must be prepared on FCC Form 601 and must be submitted or filed...

  18. 47 CFR 90.605 - Forms to be used.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Forms to be used. 90.605 Section 90.605...-901, and 935-940 MHz Bands Application for Authorizations § 90.605 Forms to be used. Applications for conventional and trunked radio facilities must be prepared on FCC Form 601 and must be submitted or filed...

  19. 47 CFR 90.683 - EA-based SMR system operations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.683 EA-based SMR system operations. (a) EA-based licensees authorized in the 809-824/854-869 MHz band pursuant to § 90.681 of this part may construct...

  20. 47 CFR 90.683 - EA-based SMR system operations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.683 EA-based SMR system operations. (a) EA-based licensees authorized in the 809-824/854-869 MHz band pursuant to § 90.681 of this part may construct...

  1. 47 CFR 90.683 - EA-based SMR system operations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.683 EA-based SMR system operations. (a) EA-based licensees authorized in the 809-824/854-869 MHz band pursuant to § 90.681 of this part may construct...

  2. 47 CFR 90.683 - EA-based SMR system operations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 806-824, 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.683 EA-based SMR system operations. (a) EA-based licensees authorized in the 809-824/854-869 MHz band pursuant to § 90.681 of this part may construct...

  3. 47 CFR 95.628 - MedRadio transmitters in the 413-419 MHz, 426-432 MHz, 438-444 MHz, and 451-457 MHz and 2360-2400...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...-432 MHz, 438-444 MHz, and 451-457 MHz and 2360-2400 MHz bands. 95.628 Section 95.628 Telecommunication..., 438-444 MHz, and 451-457 MHz and 2360-2400 MHz bands. The following provisions apply to MedRadio transmitters operating in the 413-419 MHz, 426-432 MHz, 438-444 MHz, and 451-457 MHz bands as part of a...

  4. 47 CFR 95.628 - MedRadio transmitters in the 413-419 MHz, 426-432 MHz, 438-444 MHz, and 451-457 MHz and 2360-2400...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...-432 MHz, 438-444 MHz, and 451-457 MHz and 2360-2400 MHz bands. 95.628 Section 95.628 Telecommunication..., 438-444 MHz, and 451-457 MHz and 2360-2400 MHz bands. The following provisions apply to MedRadio transmitters operating in the 413-419 MHz, 426-432 MHz, 438-444 MHz, and 451-457 MHz bands as part of a...

  5. 47 CFR 27.1250 - Transition of the 2150-2160/62 MHz band from the Broadband Radio Service to the Advanced Wireless...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the Broadband Radio Service to the Advanced Wireless Service. 27.1250 Section 27.1250 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS... Service to the Advanced Wireless Service. The 2150-2160/62 MHz band has been allocated for use by...

  6. 47 CFR 27.1250 - Transition of the 2150-2160/62 MHz band from the Broadband Radio Service to the Advanced Wireless...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... the Broadband Radio Service to the Advanced Wireless Service. 27.1250 Section 27.1250 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS... Service to the Advanced Wireless Service. The 2150-2160/62 MHz band has been allocated for use by...

  7. 47 CFR 27.16 - Network access requirements for Block C in the 746-757 and 776-787 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Network access requirements for Block C in the 746-757 and 776-787 MHz bands. 27.16 Section 27.16 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Applications and...

  8. 47 CFR 27.1250 - Transition of the 2150-2160/62 MHz band from the Broadband Radio Service to the Advanced Wireless...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... the Broadband Radio Service to the Advanced Wireless Service. 27.1250 Section 27.1250 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS... Service to the Advanced Wireless Service. The 2150-2160/62 MHz band has been allocated for use by...

  9. 47 CFR 27.16 - Network access requirements for Block C in the 746-757 and 776-787 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Network access requirements for Block C in the 746-757 and 776-787 MHz bands. 27.16 Section 27.16 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Applications and...

  10. 47 CFR 27.1250 - Transition of the 2150-2160/62 MHz band from the Broadband Radio Service to the Advanced Wireless...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... the Broadband Radio Service to the Advanced Wireless Service. 27.1250 Section 27.1250 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS... Service to the Advanced Wireless Service. The 2150-2160/62 MHz band has been allocated for use by...

  11. 47 CFR 27.16 - Network access requirements for Block C in the 746-757 and 776-787 MHz bands.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false Network access requirements for Block C in the 746-757 and 776-787 MHz bands. 27.16 Section 27.16 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Applications and...

  12. 47 CFR 27.16 - Network access requirements for Block C in the 746-757 and 776-787 MHz bands.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false Network access requirements for Block C in the 746-757 and 776-787 MHz bands. 27.16 Section 27.16 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Applications and...

  13. 47 CFR 27.1250 - Transition of the 2150-2160/62 MHz band from the Broadband Radio Service to the Advanced Wireless...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... the Broadband Radio Service to the Advanced Wireless Service. 27.1250 Section 27.1250 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS... Service to the Advanced Wireless Service. The 2150-2160/62 MHz band has been allocated for use by...

  14. 47 CFR 76.610 - Operation in the frequency bands 108-137 and 225-400 MHz-scope of application.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Operation in the frequency bands 108-137 and 225-400 MHz-scope of application. 76.610 Section 76.610 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES MULTICHANNEL VIDEO AND CABLE TELEVISION SERVICE...

  15. 47 CFR 74.690 - Transition of the 1990-2025 MHz band from the Broadcast Auxiliary Service to emerging technologies.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Broadcast Auxiliary Service to emerging technologies. 74.690 Section 74.690 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO, AUXILIARY, SPECIAL BROADCAST... of the 1990-2025 MHz band from the Broadcast Auxiliary Service to emerging technologies. (a)...

  16. 47 CFR 74.690 - Transition of the 1990-2025 MHz band from the Broadcast Auxiliary Service to emerging technologies.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Broadcast Auxiliary Service to emerging technologies. 74.690 Section 74.690 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO, AUXILIARY, SPECIAL BROADCAST... of the 1990-2025 MHz band from the Broadcast Auxiliary Service to emerging technologies. (a)...

  17. 47 CFR 27.16 - Network access requirements for Block C in the 746-757 and 776-787 MHz bands.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Network access requirements for Block C in the... § 27.16 Network access requirements for Block C in the 746-757 and 776-787 MHz bands. (a) Applicability... the devices and applications of their choice on the licensee's C Block network, except: (1) Insofar...

  18. 47 CFR 76.610 - Operation in the frequency bands 108-137 and 225-400 MHz-scope of application.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Operation in the frequency bands 108-137 and 225-400 MHz-scope of application. 76.610 Section 76.610 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES MULTICHANNEL VIDEO AND CABLE TELEVISION SERVICE...

  19. 47 CFR 78.40 - Transition of the 1990-2025 MHz band from the Cable Television Relay Service to emerging...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Cable Television Relay Service to emerging technologies. 78.40 Section 78.40 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE Applications and Licenses § 78.40 Transition of the 1990-2025 MHz band from the Cable Television Relay Service to...

  20. 47 CFR 78.40 - Transition of the 1990-2025 MHz band from the Cable Television Relay Service to emerging...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Cable Television Relay Service to emerging technologies. 78.40 Section 78.40 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE Applications and Licenses § 78.40 Transition of the 1990-2025 MHz band from the Cable Television Relay Service to...

  1. 47 CFR 78.40 - Transition of the 1990-2025 MHz band from the Cable Television Relay Service to emerging...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Cable Television Relay Service to emerging technologies. 78.40 Section 78.40 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE Applications and Licenses § 78.40 Transition of the 1990-2025 MHz band from the Cable Television Relay Service to...

  2. 47 CFR 74.690 - Transition of the 1990-2025 MHz band from the Broadcast Auxiliary Service to emerging technologies.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Broadcast Auxiliary Service to emerging technologies. 74.690 Section 74.690 Telecommunication FEDERAL... of the 1990-2025 MHz band from the Broadcast Auxiliary Service to emerging technologies. (a) New Entrants are collectively defined as those licensees proposing to use emerging technologies to...

  3. 47 CFR 15.323 - Specific requirements for devices operating in the 1920-1930 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... intended transmission and have a maximum reaction time less than 50xSQRT (1.25/emission bandwidth in MHz... reaction time shall be 35xSQRT (1.25/emission bandwidth in MHz) microseconds but shall not be required to... given frequency carrier shall maintain a frame repetition rate with a frequency stability of at least...

  4. 47 CFR 90.619 - Operations within the U.S./Mexico and U.S./Canada border areas.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... § 90.619, see the List of CFR Sections Affected, which appears in the Finding Aids section of the... 47 Telecommunication 5 2010-10-01 2010-10-01 false Operations within the U.S./Mexico and U.S...-869 Mhz, 896-901 Mhz, and 935-940 Mhz Bands § 90.619 Operations within the U.S./Mexico and...

  5. 47 CFR 90.681 - EA-based SMR service areas.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.681 EA-based SMR service areas. EA licenses in for channels 711 through 830 and Spectrum Blocks A through V listed in Tables 4 and 5 of § 90.617 are available...

  6. 47 CFR 90.681 - EA-based SMR service areas.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.681 EA-based SMR service areas. EA licenses in for channels 711 through 830 and Spectrum Blocks A through V listed in Tables 4 and 5 of § 90.617 are available...

  7. 47 CFR 90.681 - EA-based SMR service areas.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.681 EA-based SMR service areas. EA licenses in for channels 711 through 830 and Spectrum Blocks A through V listed in Tables 4 and 5 of § 90.617 are available...

  8. 47 CFR 90.681 - EA-based SMR service areas.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.681 EA-based SMR service areas. EA licenses in for channels 711 through 830 and Spectrum Blocks A through V listed in Tables 4 and 5 of § 90.617 are available...

  9. 47 CFR 90.681 - EA-based SMR service areas.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., 851-869, 896-901, and 935-940 MHz Bands Policies Governing the Licensing and Use of Ea-Based Smr Systems in the 809-824/851-869 Mhz Band § 90.681 EA-based SMR service areas. EA licenses in for channels 711 through 830 and Spectrum Blocks A through V listed in Tables 4 and 5 of § 90.617 are available...

  10. 47 CFR 15.249 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, 5725-5875 MHZ, and 24.0-24.25 GHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits... emissions from intentional radiators operated within these frequency bands shall comply with the following..., and multiple co-located intentional radiators transmitting the same information are not allowed....

  11. 47 CFR 15.249 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, 5725-5875 MHZ, and 24.0-24.25 GHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits... emissions from intentional radiators operated within these frequency bands shall comply with the following..., and multiple co-located intentional radiators transmitting the same information are not allowed....

  12. 47 CFR 15.249 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, 5725-5875 MHZ, and 24.0-24.25 GHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits... emissions from intentional radiators operated within these frequency bands shall comply with the following..., and multiple co-located intentional radiators transmitting the same information are not allowed....

  13. 47 CFR 15.249 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, 5725-5875 MHZ, and 24.0-24.25 GHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits... emissions from intentional radiators operated within these frequency bands shall comply with the following..., and multiple co-located intentional radiators transmitting the same information are not allowed....

  14. 47 CFR 15.249 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, 5725-5875 MHZ, and 24.0-24.25 GHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits... emissions from intentional radiators operated within these frequency bands shall comply with the following..., and multiple co-located intentional radiators transmitting the same information are not allowed....

  15. 47 CFR 95.1119 - Specific requirements for wireless medical telemetry devices operating in the 608-614 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... frequency range 608-614 MHz and that will be located near the radio astronomy observatories listed below..., and obtain the written concurrence of, the director of the affected radio astronomy observatory before the equipment can be installed or operated (a) Within 80 kilometers of: (1) National Astronomy...

  16. 47 CFR 95.1119 - Specific requirements for wireless medical telemetry devices operating in the 608-614 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... frequency range 608-614 MHz and that will be located near the radio astronomy observatories listed below..., and obtain the written concurrence of, the director of the affected radio astronomy observatory before the equipment can be installed or operated (a) Within 80 kilometers of: (1) National Astronomy...

  17. 47 CFR 95.1119 - Specific requirements for wireless medical telemetry devices operating in the 608-614 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... frequency range 608-614 MHz and that will be located near the radio astronomy observatories listed below..., and obtain the written concurrence of, the director of the affected radio astronomy observatory before the equipment can be installed or operated (a) Within 80 kilometers of: (1) National Astronomy...

  18. 47 CFR 95.1119 - Specific requirements for wireless medical telemetry devices operating in the 608-614 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... frequency range 608-614 MHz and that will be located near the radio astronomy observatories listed below..., and obtain the written concurrence of, the director of the affected radio astronomy observatory before the equipment can be installed or operated (a) Within 80 kilometers of: (1) National Astronomy...

  19. 47 CFR 95.1119 - Specific requirements for wireless medical telemetry devices operating in the 608-614 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... frequency range 608-614 MHz and that will be located near the radio astronomy observatories listed below..., and obtain the written concurrence of, the director of the affected radio astronomy observatory before the equipment can be installed or operated (a) Within 80 kilometers of: (1) National Astronomy...

  20. Investigation of dielectric properties of polymer composites reinforced with carbon nanotubes in the frequency band of 0.01 Hz - 10 MHz

    NASA Astrophysics Data System (ADS)

    Goshev, A. A.; Eseev, M. K.; Kapustin, S. N.; Vinnik, L. N.; Volkov, A. S.

    2016-08-01

    The goal of this work is experimental study of dielectric properties of polymer nanocomposites reinforced with multiwalled carbon nanotubes (MWCNTs) in alternating electric field in low frequency band of 0.01 Hz - 10 MHz. We investigated the influence, functionalization degree, aspect ratio, concentration of carbon nanotubes (CNTs) on dielectric properties of polymer sample. We also studied the dependence of dielectric properties on the polymerization temperature. The dependence of CNTs agglomeration on sample polymerization temperature and temperature's influence on conductivity has been shown. We conducted model calculation of percolation threshold and figured out its dependence on CNTs aspect ratio.

  1. A 220-1100 MHz low phase-noise frequency synthesizer with wide-band VCO and selectable I/Q divider

    NASA Astrophysics Data System (ADS)

    Hua, Chen; Renjie, Gong; Xu, Cheng; Yulin, Zhang; Zhong, Gao; Guiliang, Guo; Yuepeng, Yan

    2014-12-01

    This paper presents a low phase-noise fractional-N frequency synthesizer which provides an in-phase/quadrature-phase (I/Q) signal over a frequency range of 220-1100 MHz for wireless networks of industrial automation (WIA) applications. Two techniques are proposed to achieve the wide range. First, a 1.4-2.2 GHz ultralow gain voltage-controlled oscillator (VCO) is adopted by using 128 tuning curves. Second, a selectable I/Q divider is employed to divide the VCO frequency by 2 or 3 or 4 or 6. Besides, a phase-switching prescaler is proposed to lower PLL phase noise, a self-calibrated charge pump is used to suppress spur, and a detect-boosting phase frequency detector is adopted to shorten settling time. With a 200 kHz loop bandwidth, lowest measured phase noise is -106 dBc/Hz at a 10 kHz offset and -131 dBc/Hz at a 1 MHz offset. Fabricated in the TSMC 0.18 μm CMOS process, the synthesizer occupies a chip area of 1.2 mm2, consumes only 15 mW from the 1.8 V power supply, and settles within 13.2 μs. The synthesizer is optimized for the WIA applications, but can also be used for other short-range wireless communications, such as 433, 868, 916 MHz ISM band applications.

  2. 77 FR 52633 - Public Safety and Homeland Security Bureau Seeks Comment on Post-Reconfiguration 800 MHz Band...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-30

    ... interference to public safety and other land mobile communication systems operating in the band, 69 FR 67823... propose and adopt border area band plans once agreements are reached with Canada and Mexico, 72 FR 39756...) by filing paper copies. See Electronic Filing of Documents in Rulemaking Proceedings, 63 FR...

  3. Parallel β-sheet vibration band increases with proteins dipole moment under exposure to 1765 MHz microwaves.

    PubMed

    Calabrò, Emanuele; Magazù, Salvatore

    2016-02-01

    Effects of exposure of 4 h to mobile phones microwaves at 1765 MHz at a power density around 940 mW/m(2) on four typical proteins (hemoglobin in H2 O solution, and myoglobin, bovine serum albumin, and lysozyme in D2 O solution) were studied by means of Fourier Transform Infrared spectroscopy and Fourier self-deconvolution analysis. Increase in intensity of parallel β-sheet component around 1635 cm(-1) was observed after exposure of hemoglobin, myoglobin, and bovine serum albumin, showing that a mechanism of unfolding occurred after exposure, whereas no appreciable change in the amide I region occurred after lysozyme exposure. In addition, a relationship between protein dipole moment and protein unfolding rate was demonstrated with a correlation coefficient r = 0.973 and 95% confidence interval.

  4. 78 FR 72851 - Commission Seeks Comment on Licensing Models and Technical Requirements in the 3550-3650 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-04

    ... Commission's Public Notice in GN Docket No. 12-354, FCC 13-144A1, Notice of Proposed Rulemaking, 78 FR 1188... Proceedings, 63 FR 24121 (1998). Electronic Filers: Comments may be filed electronically using the Internet by... deployment while protecting existing incumbent users of the 3.5 GHz Band. See 3.5 GHz NPRM, 78 FR 1188....

  5. Investigation of influence of orientation effects in polymeric composite materials, reinforced with carbon nanotubes, on electrical properties of the sample in frequency band from 0.01 to 10 MHz

    NASA Astrophysics Data System (ADS)

    Eseev, M. K.; Vinnik, L. N.; Goshev, A. A.; Volkov, A. S.

    2016-09-01

    The goal of this work is experimental study of electrical properties of polymeric nanocomposites, reinforced with MWCNTs of a model TAUNIT-MD, in alternating electrical field in frequency band from 0.01 Hz to 10 MHz The influence of electrical field, causing orientation effect on CNTs in polymer matrix, has been studied.

  6. The Application of the 900 MHz Band to Law Enforcement Communications: An Analysis of Technical and Regulatory Factors Affecting the Applicability of the 900 MHz Portion of the Radio Spectrum to Law Enforcement Communication System Problems.

    ERIC Educational Resources Information Center

    Kavanagh, Donal D.

    The Federal Communications Commission's opening of the 900 MHz spectrum for use by the land mobile radio community was a landmark event in the history of mobile radio in the United States, as this action almost doubled the amount of spectrum available. This report describes the current regulatory environment, analyzes the applicability of 900 MHz…

  7. Measurement of DNA damage after exposure to electromagnetic radiation in the cellular phone communication frequency band (835.62 and 847.74 MHz).

    PubMed

    Malyapa, R S; Ahern, E W; Straube, W L; Moros, E G; Pickard, W F; Roti Roti, J L

    1997-12-01

    Mouse C3H 10T1/2 fibroblasts and human glioblastoma U87MG cells were exposed to cellular phone communication frequency radiations to investigate whether such exposure produces DNA damage in in vitro cultures. Two types of frequency modulations were studied: frequency-modulated continuous-wave (FMCW), with a carrier frequency of 835.62 MHz, and code-division multiple-access (CDMA) centered on 847.74 MHz. Exponentially growing (U87MG and C3H 10T1/2 cells) and plateau-phase (C3H 10T1/2 cells) cultures were exposed to either FMCW or CDMA radiation for varying periods up to 24 h in specially designed radial transmission lines (RTLs) that provided relatively uniform exposure with a specific absorption rate (SAR) of 0.6 W/kg. Temperatures in the RTLs were monitored continuously and maintained at 37 +/- 0.3 degrees C. Sham exposure of cultures in an RTL (negative control) and 137Cs gamma-irradiated samples (positive control) were included with every experiment. The alkaline comet assay as described by Olive et al. (Exp. Cell Res. 198, 259-269, 1992) was used to measure DNA damage. No significant differences were observed between the test group exposed to FMCW or CDMA radiation and the sham-treated negative controls. Our results indicate that exposure of cultured mammalian cells to cellular phone communication frequencies under these conditions at an SAR of 0.6 W/kg does not cause DNA damage as measured by the alkaline comet assay. PMID:9399708

  8. 47 CFR 90.677 - Reconfiguration of the 806-824/851-869 MHz band in order to separate cellular systems from non...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... relevant to a “good-faith” determination are: (1) Whether the party responsible for paying the cost of band... parties have taken to determine the actual cost of relocation to comparable facilities; and (3) Whether either party has unreasonably withheld information, essential to the accurate estimation of...

  9. 77 FR 18991 - Channel Spacing and Bandwidth Limitations for Certain Economic Area (EA)-Based 800 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-29

    ... spectrum in the 800 MHz band for EA-based licensing in the 800 MHz SMR First Report and Order, at 61 FR... available spectrum within the block.'' The Commission also adopted an out-of-band emission requirement that... the 800 MHz band in the 800 MHz Reconfiguration Report and Order, at 69 FR 67823, Nov. 22, 2004,...

  10. 47 CFR 27.1021 - Reimbursement obligation of licensees at 1915-1920 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... licensees at 1915-1920 MHz. A licensee in the 1915-1920 MHz band (Lower H Block) shall, within 30 days of... MHz band on a pro rata shared basis with other Lower H Block licensees as set forth in paragraphs (a... this spectrum cover, collectively, at least forty (40) percent of the nation's population, the...

  11. 75 FR 3639 - Revisions to Rules Authorizing the Operation of Low Power Auxiliary Stations in the 698-806 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-22

    ... 698-806 MHz Band; Public Interest Spectrum Coalition, Petition for Rulemaking Regarding Low Power... Power Auxiliary Stations in the 698-806 MHz Band; Public Interest Spectrum Coalition, Petition for... Operation of Low Power Auxiliary Stations in the 698-806 MHz Band; Public Interest Spectrum...

  12. 75 FR 9113 - Revisions to Rules Authorizing the Operation of Low Power Auxiliary Stations in the 698-806 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-01

    ... Stations in the 698-806 MHz Band; Public Interest Spectrum Coalition, Petition for Rulemaking Regarding Low... Authorizing the Operation of Low Power Auxiliary Stations in the 698-806 MHz Band; Public Interest Spectrum... Auxiliary Stations in the 698-806 MHz Band; Public Interest Spectrum Coalition, Petition for...

  13. 77 FR 19575 - Promoting Interoperability in the 700 MHz Commercial Spectrum; Interoperability of Mobile User...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-02

    ... Mobile User Equipment Across Paired Commercial Spectrum Blocks in the 700 MHz Band AGENCY: Federal... MHz band and to encourage the efficient use of spectrum. DATES: Interested parties may file comments...), illustrated in the following figure, is comprised of 70 megahertz of commercial, non-guard band spectrum,...

  14. A 50 MHz System for GMRT

    NASA Astrophysics Data System (ADS)

    Udaya Shankar, N.; Dwarakanath, K. S.; Amiri, S.; Somashekar, R.; Girish, B. S.; Laus, W.; Nayak, A.

    2009-09-01

    This paper describes a 50~MHz system being developed for GMRT to provide imaging capability in the frequency range 30-90~MHz. Due to its larger collecting area and higher antenna efficiency, the low-frequency GMRT system will be several times more sensitive than the present 74~MHz VLA system and is likely to remain a competitive instrument in this frequency band. In the first phase of this project, receiver systems consisting of V-dipole feeds and front-ends have been installed on four of the thirty GMRT antennas. Test observations were carried out on a number of bright 3CR sources. The initial results are encouraging. This paper will also describe results of simultaneous observations carried out using the existing GMRT correlator, the new GMRT software correlator and a system employing digitization and direct recording of signals at two antenna bases.

  15. Hunting for MHz gravitational waves with the Fermilab Holometer

    NASA Astrophysics Data System (ADS)

    Kamai, Brittany; The Holometer Collaboration Collaboration

    2016-03-01

    The highest frequency end of the gravitational wave spectrum remains poorly constrained. Cosmic strings and primordial black holes are potential gravitational waves candidates that could radiate at MHz frequencies. The existence of nearby sources can be tested using the Fermilab Holometer, two nested 40 meter Michelson interferometers. This instrument can achieve strain sensitivity better than 10- 20 / rt .Hz within the 1-10 MHz frequency band. The Holometer is fully operational and has taken long observational campaigns acquiring 100s of hours of science quality data. I will present results of a search for narrow-lined sources and constraints on the stochastic background in the MHz band.

  16. 47 CFR 90.531 - Band plan.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Band plan. 90.531 Section 90.531...-805 MHz Bands § 90.531 Band plan. This section sets forth the band plan for the 763-775 MHz and 793... and portables subject to Commission-approved regional planning committee regional plans....

  17. 47 CFR 90.531 - Band plan.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Band plan. 90.531 Section 90.531...-805 MHz Bands § 90.531 Band plan. This section sets forth the band plan for the 758-775 MHz and 788... and portables subject to Commission-approved regional planning committee regional plans....

  18. 47 CFR 90.531 - Band plan.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Band plan. 90.531 Section 90.531...-805 MHz Bands § 90.531 Band plan. This section sets forth the band plan for the 758-775 MHz and 788... and portables subject to Commission-approved regional planning committee regional plans....

  19. 47 CFR 90.901 - 800 MHz SMR spectrum subject to competitive bidding.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Specialized Mobile Radio Service § 90.901 800 MHz SMR spectrum subject to competitive bidding. Mutually exclusive initial applications for 800 MHz band licenses in Spectrum Blocks A through V are subject to... 47 Telecommunication 5 2011-10-01 2011-10-01 false 800 MHz SMR spectrum subject to...

  20. 47 CFR 90.901 - 800 MHz SMR spectrum subject to competitive bidding.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Specialized Mobile Radio Service § 90.901 800 MHz SMR spectrum subject to competitive bidding. Mutually exclusive initial applications for 800 MHz band licenses in Spectrum Blocks A through V are subject to... 47 Telecommunication 5 2012-10-01 2012-10-01 false 800 MHz SMR spectrum subject to...

  1. 47 CFR 90.901 - 800 MHz SMR spectrum subject to competitive bidding.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Specialized Mobile Radio Service § 90.901 800 MHz SMR spectrum subject to competitive bidding. Mutually exclusive initial applications for 800 MHz band licenses in Spectrum Blocks A through V are subject to... 47 Telecommunication 5 2014-10-01 2014-10-01 false 800 MHz SMR spectrum subject to...

  2. 47 CFR 90.901 - 800 MHz SMR spectrum subject to competitive bidding.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Specialized Mobile Radio Service § 90.901 800 MHz SMR spectrum subject to competitive bidding. Mutually exclusive initial applications for 800 MHz band licenses in Spectrum Blocks A through V are subject to... 47 Telecommunication 5 2010-10-01 2010-10-01 false 800 MHz SMR spectrum subject to...

  3. 47 CFR 90.901 - 800 MHz SMR spectrum subject to competitive bidding.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Specialized Mobile Radio Service § 90.901 800 MHz SMR spectrum subject to competitive bidding. Mutually exclusive initial applications for 800 MHz band licenses in Spectrum Blocks A through V are subject to... 47 Telecommunication 5 2013-10-01 2013-10-01 false 800 MHz SMR spectrum subject to...

  4. 47 CFR 90.264 - Disaster communications between 2 and 10 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Disaster communications between 2 and 10 MHz... Bands § 90.264 Disaster communications between 2 and 10 MHz. (a) The use of any particular frequency... 10 MHz: (1) To provide communications circuits in emergency and/or disaster situations, where...

  5. 47 CFR 90.264 - Disaster communications between 2 and 10 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Disaster communications between 2 and 10 MHz... Bands § 90.264 Disaster communications between 2 and 10 MHz. (a) The use of any particular frequency... 10 MHz: (1) To provide communications circuits in emergency and/or disaster situations, where...

  6. 47 CFR 90.264 - Disaster communications between 2 and 10 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Disaster communications between 2 and 10 MHz... Bands § 90.264 Disaster communications between 2 and 10 MHz. (a) The use of any particular frequency... 10 MHz: (1) To provide communications circuits in emergency and/or disaster situations, where...

  7. 47 CFR 90.264 - Disaster communications between 2 and 10 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Disaster communications between 2 and 10 MHz... Bands § 90.264 Disaster communications between 2 and 10 MHz. (a) The use of any particular frequency... 10 MHz: (1) To provide communications circuits in emergency and/or disaster situations, where...

  8. 47 CFR 90.264 - Disaster communications between 2 and 10 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Disaster communications between 2 and 10 MHz... Bands § 90.264 Disaster communications between 2 and 10 MHz. (a) The use of any particular frequency... 10 MHz: (1) To provide communications circuits in emergency and/or disaster situations, where...

  9. 47 CFR 27.1031 - Reimbursement obligation of licensees at 1995-2000 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... licensees at 1995-2000 MHz. A licensee in the 1995-2000 MHz band (Upper H Block) shall, within 30 days of... band, on a pro rata shared basis with other Upper H Block licensees as set forth in paragraphs (a... this spectrum cover, collectively, at least forty (40) percent of the nation's population, the...

  10. Calibration System for SLC 476MHz to 2856MHz Multipliers

    SciTech Connect

    Akre, Ron; /SLAC

    2011-08-26

    The two mile long Main Drive Line (MDL) distributes 476MHz at each of the 31 sectors along its length. Each of the 31 sectors has a six times multiplier which drives the 2856MHz phase reference system for that sector. This system is used to set and maintain phase of the accelerator structures over time. During previous runs significant down time resulted from sector phasing which was required after multiplier replacement. A system was designed to calibrate the phase of the 476MHz input to the phase of the 2856MHz output of the multiplier units. This enabled multipliers to be replaced without rephasing sectors.

  11. 47 CFR 90.477 - Interconnected systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...) Applicants for new land stations to be interconnected with the public switched telephone network must... switched telephone network only after modifying their license. See § 1.929 of this chapter. In all cases a..., 896-901 MHz, and 935-940 MHz, interconnection with the public switched telephone network is...

  12. 75 FR 3622 - Revisions to Rules Authorizing the Operation of Low Power Auxiliary Stations in the 698-806 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-22

    ... Stations in the 698-806 MHz Band; Public Interest Spectrum Coalition, Petition for Rulemaking Regarding Low... decisions in this Report and Order and of the need to clear the 700 MHz Band so that the spectrum can be...] will not be allowed to use * * * in the UHF-TV band due to a recent spectrum reallocation of...

  13. Simultaneous Observations of Giant Pulses from Pulsar PSR B0950+08 at 42 MHz and 74 MHz

    NASA Astrophysics Data System (ADS)

    Tsai, -Wei, Jr.; Simonetti, John H.; Akukwe, Bernadine; Bear, Brandon; Gough, Jonathan D.; Shawhan, Peter; Kavic, Michael

    2016-02-01

    We report the detection of giant pulse (GP) emission from PSR B0950+08 in 12 hr of observations made simultaneously at 42 and 74 MHz, using the first station of the Long Wavelength Array. We detected 275 GPs (in 0.16% of the pulse periods) and 465 GPs (0.27%) at 42 and 74 MHz, respectively. The pulsar is weaker and produces less frequent GPs than at 100 MHz. Here, GPs are taken as having ≥slant 10 times the flux density of an average pulse (AP); their cumulative distribution of pulse strength follows a power law, with an index of -4.1 at 42 MHz and -5.1 at 74 MHz, which is much less steep than would be expected if we were observing the tail of a Gaussian distribution of normal pulses. We detected no other transient pulses in a wide dispersion measure range from 1 to 5000 pc cm-3. There were 128 GPs detected within the same periods from both 42 and 74 MHz, which means more than half of them are not generated in a wide band. The CLEAN-based algorithm was used to deconvolve the the effect of scattering broadening and we have concluded that the scattering effect from the interstellar medium at 42 and 74 MHz is weak and cannot be distinguished from the pulse profiles. We calculated the altitude r of the emission region using the dipolar magnetic field model. We found r(42 MHz) = 29.27 km (0.242% of RLC) and r(74 MHz) = 29.01 km (0.240% of RLC) for the AP, while for GPs, r(42 MHz) = 29.10 km (0.241% of RLC) and r(74 MHz) = 28.95 km (0.240% of RLC). GPs, which have a double-peak structure, have a smaller mean peak-to-peak separation compared to the AP.

  14. Multi-MHz retinal OCT

    PubMed Central

    Klein, Thomas; Wieser, Wolfgang; Reznicek, Lukas; Neubauer, Aljoscha; Kampik, Anselm; Huber, Robert

    2013-01-01

    We analyze the benefits and problems of in vivo optical coherence tomography (OCT) imaging of the human retina at A-scan rates in excess of 1 MHz, using a 1050 nm Fourier-domain mode-locked (FDML) laser. Different scanning strategies enabled by MHz OCT line rates are investigated, and a simple multi-volume data processing approach is presented. In-vivo OCT of the human ocular fundus is performed at different axial scan rates of up to 6.7 MHz. High quality non-mydriatic retinal imaging over an ultra-wide field is achieved by a combination of several key improvements compared to previous setups. For the FDML laser, long coherence lengths and 72 nm wavelength tuning range are achieved using a chirped fiber Bragg grating in a laser cavity at 419.1 kHz fundamental tuning rate. Very large data sets can be acquired with sustained data transfer from the data acquisition card to host computer memory, enabling high-quality averaging of many frames and of multiple aligned data sets. Three imaging modes are investigated: Alignment and averaging of 24 data sets at 1.68 MHz axial line rate, ultra-dense transverse sampling at 3.35 MHz line rate, and dual-beam imaging with two laser spots on the retina at an effective line rate of 6.7 MHz. PMID:24156052

  15. The effect of radio frequency interference on the 136- to 138-MHz return link and 400.5- to 401.5-MHz forward link of the Tracking and Data Relay Satellite System

    NASA Technical Reports Server (NTRS)

    Jenny, J.; Lyttle, J. D.

    1973-01-01

    The purpose is to update the RFI estimates in the 136- to 138-MHz VHF band and to make estimates for the first time for the 400.5- to 401.5-MHz UHF band. These preliminary predictions are based on primarily ITU frequency-registration data, with missing data bridged by engineering judgement.

  16. 47 CFR 27.905 - 1670-1675 MHz service licenses subject to competitive bidding.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false 1670-1675 MHz service licenses subject to competitive bidding. 27.905 Section 27.905 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1670-1675 MHz Band § 27.905...

  17. 47 CFR 27.905 - 1670-1675 MHz service licenses subject to competitive bidding.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false 1670-1675 MHz service licenses subject to competitive bidding. 27.905 Section 27.905 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1670-1675 MHz Band § 27.905...

  18. 47 CFR 27.905 - 1670-1675 MHz service licenses subject to competitive bidding.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false 1670-1675 MHz service licenses subject to competitive bidding. 27.905 Section 27.905 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1670-1675 MHz Band § 27.905...

  19. 47 CFR 90.18 - Public Safety 700 MHz Nationwide Broadband Network.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Network. 90.18 Section 90.18 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND... 700 MHz Nationwide Broadband Network. The 763-768/793-798 MHz band is dedicated to a broadband public..., pursuant to a Network Sharing Agreement and such other agreements as the Commission may require....

  20. 47 CFR 27.905 - 1670-1675 MHz service licenses subject to competitive bidding.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false 1670-1675 MHz service licenses subject to competitive bidding. 27.905 Section 27.905 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1670-1675 MHz Band § 27.905...

  1. 47 CFR 27.905 - 1670-1675 MHz service licenses subject to competitive bidding.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false 1670-1675 MHz service licenses subject to competitive bidding. 27.905 Section 27.905 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES 1670-1675 MHz Band § 27.905...

  2. 47 CFR 90.18 - Public Safety 700 MHz Nationwide Broadband Network.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Network. 90.18 Section 90.18 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND... 700 MHz Nationwide Broadband Network. The 763-768/793-798 MHz band is dedicated to a broadband public..., pursuant to a Network Sharing Agreement and such other agreements as the Commission may require....

  3. 47 CFR 90.1432 - Conditions for waiver to allow limited and temporary wideband operations in the 700 MHz public...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... of the 700 MHz band public safety spectrum except where the Commission has granted a waiver pursuant... spectrum. Where spectrum in the narrowband segment or internal guard band segment is unavailable for... temporary wideband operations in the 700 MHz public safety spectrum. 90.1432 Section...

  4. 47 CFR 90.1432 - Conditions for waiver to allow limited and temporary wideband operations in the 700 MHz public...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... of the 700 MHz band public safety spectrum except where the Commission has granted a waiver pursuant... spectrum. Where spectrum in the narrowband segment or internal guard band segment is unavailable for... temporary wideband operations in the 700 MHz public safety spectrum. 90.1432 Section...

  5. 75 FR 6316 - Revisions to Rules Authorizing the Operation of Low Power Auxiliary Stations in the 698-806 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-09

    ... 698-806 MHz Band; Public Interest Spectrum Coalition, Petition for Rulemaking Regarding Low Power... Stations in the 698-806 MHz Band; Public Interest Spectrum Coalition, Petition for Rulemaking Regarding Low..., 2010 (75 FR 3622). DATES: February 9, 2010. FOR FURTHER INFORMATION CONTACT: Paul D'Ari,...

  6. Millisecond solar radio spikes observed at 1420 MHz

    NASA Astrophysics Data System (ADS)

    Dabrowski, B. P.; Kus, A. J.

    We present results from observations of narrowband solar millisecond radio spikes at 1420 MHz. Observing data were collected between February 2000 and December 2001 with the 15-m radio telescope at the Centre for Astronomy Nicolaus Copernicus University in Torun, Poland, equipped with a radio spectrograph that covered the 1352-1490 MHz frequency band. The radio spectrograph has 3 MHz frequency resolution and 80 microsecond time resolution. We analyzed the individual radio spike duration, bandwidth and rate of frequency drift. A part of the observed spikes showed well-outlined subtle structures. On dynamic radio spectrograms of the investigated events we notice complex structures formed by numerous individual spikes known as chains of spikes and distinctly different structure of columns. Positions of active regions connected with radio spikes emission were investigated. It turns out that most of them are located near the center of the solar disk, suggesting strong beaming of the spikes emission.

  7. 805 MHz and 201 MHz RF cavity development for MUCOOL

    SciTech Connect

    DLi@lbl.gov

    2002-10-10

    A muon cooling channel calls for very high acceleratinggradient RF structures to restore the energy lost by muons in theabsorbers. The RF structures have to be operated in a strong magneticfield and thus the use of superconducting RF cavities is excluded. Toachieve a high shunt impedance while maintaining a large enough apertureto accommodate a large transverse emittance muon beam, the cavity designadopted is a pillbox-like geometry with thin Be foils to terminate theelectromagnetic field at the cavity iris. The possibility of using gridsof thin-walled metallic tubes for the termination is also being explored.Many of the RF-related issues for muon cooling channels are being studiedboth theoretically and experimentally using an 805 MHz cavity that has apillbox-like geometry with thin Be windows to terminate the cavityaperture. The design and performance of this cavity are reported here.High-power RF tests of the 805 MHz cavity are in progress at Lab G inFermilab. The cavity has exceeded its design gradient of 30 MV/m,reaching 34 MV/m without external magnetic field. No surface damage wasobserved at this gradient. The cavity is currently under conditioning atLab G with an external magnetic field of 2.5 T. We also present here a201 MHz cavity design for muoncooling channels. The proposed cavitydesign is also suitable for use in a proof-of-principle Muon IonizationCooling Experiment (MICE).

  8. 78 FR 66298 - Promoting Interoperability in the 700 MHz Commercial Spectrum; Requests for Waiver and Extension...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-05

    ... telecommunications standards bodies that, among other things, establishes standards for different LTE band classes. A... cellular band. In the Interoperability NPRM, 77 FR 19575, April 2, 2012, the Commission discussed the... in the Lower 700 MHz Report and Order, 67 FR 5491, Feb. 6, 2002, it observed that the Lower 700...

  9. Preferred Frequency Range, Technical Characteristics, and Interference Assessment for a Microwave Observatory of Subsurface and Subcanopy (MOSS) for 1 MHZ Bandwidth in the Frequency Range of 100-150 MHz

    NASA Technical Reports Server (NTRS)

    Honeycutt, Bryan L.

    2005-01-01

    This document presents rationale for the frequency band selection, technical and operational characteristics of active spaceborne sensors in the Earth Exploration-Satellite Service (active), and interference assessment for a 1 MHz bandwidth sensor in the 100-150 MHz frequency range. The active spaceborne sensors expected to be operating in the frequency range of 100-150 MHz is the synthetic aperture radar (SAR) such as the MOSS. The technical characteristics, mission objectives, orbital parameters, design parameters, antenna characteristics, and preliminary interference assessment are given for MOSS. The purpose of the document is to provide rationale for the frequency band selection, technical characteristics of the active spaceborne sensor Microwave Observatory of Subsurface and Subcanopy (MOSS) that can be used to analyze the compatibility of active spaceborne sensors and other systems of 1 MHz bandwidth in the 100-150 MHz frequency band.

  10. 47 CFR 25.252 - Special requirements for ancillary terrestrial components operating in the 2000-2020 MHz/2180...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Special requirements for ancillary terrestrial components operating in the 2000-2020 MHz/2180-2200 MHz bands. 25.252 Section 25.252 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS...

  11. 47 CFR 25.252 - Special requirements for ancillary terrestrial components operating in the 2000-2020 MHz/2180...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false Special requirements for ancillary terrestrial components operating in the 2000-2020 MHz/2180-2200 MHz bands. 25.252 Section 25.252 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS...

  12. 47 CFR 25.252 - Special requirements for ancillary terrestrial components operating in the 2000-2020 MHz/2180...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false Special requirements for ancillary terrestrial components operating in the 2000-2020 MHz/2180-2200 MHz bands. 25.252 Section 25.252 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS...

  13. 75 FR 41767 - Amendment of the Commission's Rules To Accommodate 30 Megahertz Channels in the 6525-6875 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-19

    .... Allowing wider bandwidth channels in the Upper 6 GHz Band makes an additional source of spectrum for high... 6525-6875 MHz Band; and To Provide for Conditional Authorization on Additional Channels in the 21.8-22.0 GHz and 23.0-23.2 GHz Band AGENCY: Federal Communications Commission. ACTION: Final rule....

  14. Achievement of 1020MHz NMR.

    PubMed

    Hashi, Kenjiro; Ohki, Shinobu; Matsumoto, Shinji; Nishijima, Gen; Goto, Atsushi; Deguchi, Kenzo; Yamada, Kazuhiko; Noguchi, Takashi; Sakai, Shuji; Takahashi, Masato; Yanagisawa, Yoshinori; Iguchi, Seiya; Yamazaki, Toshio; Maeda, Hideaki; Tanaka, Ryoji; Nemoto, Takahiro; Suematsu, Hiroto; Miki, Takashi; Saito, Kazuyoshi; Shimizu, Tadashi

    2015-07-01

    We have successfully developed a 1020MHz (24.0T) NMR magnet, establishing the world's highest magnetic field in high resolution NMR superconducting magnets. The magnet is a series connection of LTS (low-Tc superconductors NbTi and Nb3Sn) outer coils and an HTS (high-Tc superconductor, Bi-2223) innermost coil, being operated at superfluid liquid helium temperature such as around 1.8K and in a driven-mode by an external DC power supply. The drift of the magnetic field was initially ±0.8ppm/10h without the (2)H lock operation; it was then stabilized to be less than 1ppb/10h by using an NMR internal lock operation. The full-width at half maximum of a (1)H spectrum taken for 1% CHCl3 in acetone-d6 was as low as 0.7Hz (0.7ppb), which was sufficient for solution NMR. On the contrary, the temporal field stability under the external lock operation for solid-state NMR was 170ppb/10h, sufficient for NMR measurements for quadrupolar nuclei such as (17)O; a (17)O NMR measurement for labeled tri-peptide clearly demonstrated the effect of high magnetic field on solid-state NMR spectra. PMID:25978708

  15. Experimental solar radio spectrum analyzer (50-100 MHz)

    NASA Technical Reports Server (NTRS)

    Maxwell, A.

    1978-01-01

    Summarized is the work carried out under a NASA Grant covering the period 15 October 1977 to 14 January 1978. The grant provided funds for the acquisition of an experimental radio spectrum analyzer covering the band 50-100 MHz, for use in a program of solar radio observations. Components for the experimental analyzer were duly obtained, and the system was assembled, checked, and put into operation in early February 1978. The analyzer is working in an entirely satisfactory manner and, from the time that it has been put into operation, it has played an important part in the on-going research programs in solar radio astronomy being conducted.

  16. 47 CFR 2.101 - Frequency and wavelength bands.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Frequency and wavelength bands. (a) The radio spectrum shall be subdivided into nine frequency bands, which... 47 Telecommunication 1 2011-10-01 2011-10-01 false Frequency and wavelength bands. 2.101 Section 2... GHz: For frequencies above 10 500 MHz. Band number Symbols Frequency range (lower limit...

  17. Differential Photometry at 1612 MHz

    NASA Astrophysics Data System (ADS)

    Lewis, B. Murray

    2009-01-01

    The 1612 MHz light curves of high latitude OH/IR stars have been observed for several years with the Arecibo 305m telescope, to derive the light-travel time diameter of their shells from the phase difference between their red and blue shifted peaks, and to look for secular evolution of their masers. However, direct intensity measurements are always limited by the extent to which the telescope's characteristics can be removed. These, in Arecibo's case, are subject to changes in the weight distribution about the structure over time, to the functioning of the vertical tie-down system, which can be interrupted by thunder storms, and by temperature-related zenith angle effects during daytime observations. Nevertheless, all of these limitations are neutralized when the ratio of the two peaks is used as the observed parameter. This form of differential photometry often results in clean light curves, though the ratio may still be perturbed by RFI, by interstellar scintillation, and more predictably by noise. The increased sensitivity of this observing mode readily detects (1) any differential evolution of the two masers, as well as (2) highlighting changes in masing gain between the two peaks around the pulsation cycle, that in turn are indicative of the operation of partially rather than fully saturated masers. In many of our light-curves there are abrupt changes in the ratio of the peak intensities at a constant pulsation phase. These are interpreted as being due to the onset of dust formation at that phase of the pulsation cycle, with a consequent abrupt change in the reprocessing of the stellar SED, and hence to an abrupt change in the maser pump. This is a feature of the Gray, Howe & Lewis (MN 364, 783 (2005)) maser model. Examples of these effects will be shown.

  18. A low-loss linear analog phase modulator for 8415 MHz transponder application

    NASA Technical Reports Server (NTRS)

    Mysoor, N.

    1989-01-01

    A breadboard single-section low-loss analog phase modulator with good thermal stability for a spacecraft transponder application has been analyzed, fabricated, and evaluated. A linear phase shift of 70 degrees with a linearity tolerance of plus or minus 7 percent was measured for this modulator from 8257 to 8634 MHz over the temperature range -20 C to 75 C. The measured insertion loss and the static delay variation with temperature were within 2 plus or minus 0.3 dB and 0.16 ps/C, respectively. Four sections will be cascaded to provide the X-band (8415 MHz) phase modulator. The generic modulator design can also be utilized at 7950 to 8075 MHz followed by X4 multiplication to provide modulation of a Ka-band downlink signal.

  19. Frequency domain interferometry using the 1290 MHz Soendre Stromfjord radar: First results

    NASA Astrophysics Data System (ADS)

    Palmer, Robert D.; Larsen, Miguel F.; Heinselman, C. J.; Mikkelsen, I. S.

    1993-08-01

    First results from the implementation of frequency domain interferometry (FDI) using an L-band frequency of 1290 MHz are presented. The experiment was conducted in September 1991 using the radar facility located in Soendre Stromford, Greenland. The spectra and the correlation functions obtained from the FDI data are compared to previous results at other frequencies. The data show the Soendre Stromford radar is providing reliable wind measurements in the lower atmosphere and that FDI can be implemented at L-band.

  20. 75 FR 9210 - Wireless Telecommunications Bureau Seeks Comment on Petition for Rulemaking Regarding 700 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-01

    ... paper copies. See Electronic Filing of Documents in Rulemaking Proceedings, 63 FR 24121 (1998... COMMISSION Wireless Telecommunications Bureau Seeks Comment on Petition for Rulemaking Regarding 700 MHz Band...: Notice. SUMMARY: The Wireless Telecommunications Bureau seeks comment on a petition for rulemaking...

  1. 78 FR 70499 - Private Land Mobile Radio Stations Below 800 MHz

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-26

    ... announcing the effective date of those rules. DATES: 47 CFR 90.187 and 47 CFR 90.425 published at 78 FR 28749... of part 90 of the Commission's rules, FCC 13-52, published at 78 FR 28749, May 16, 2013. The OMB...: October 31, 2016. ] Title: Section 90.187, Trunking in the Bands Between 150 and 512 MHz; and Sections...

  2. 47 CFR 90.266 - Long distance communications on frequencies below 25 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Long distance communications on frequencies below 25 MHz. 90.266 Section 90.266 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Standards for Special Frequencies or Frequency Bands § 90.266 Long...

  3. The ionospheric refraction at 38 MHz.

    NASA Astrophysics Data System (ADS)

    Milogradov-Turin, J.

    The investigation of the observed shift of the North Polar Spur (NPS) at the 38 MHz survey of Milogradov-Turin and Smith (1973) in respect to the position of the NPS on the survey at 408 MHz convolved to the same resolution (Haslam and Salter 1977) has shown that there is no dependence of the NPS position on frequency and that the ionospheric refraction should be larger than believed.

  4. OBSERVATIONS OF CRAB GIANT PULSES IN 20-84 MHz USING LWA1

    SciTech Connect

    Ellingson, S. W.; Wolfe, C. N.; Clarke, T. E.; Hicks, B. C.; Wilson, T. L.; Craig, J.; Taylor, G. B.; Lazio, T. J. W.

    2013-05-10

    We report the detection and observed characteristics of giant pulses from the Crab Nebula pulsar (B0531+21) in four frequency bands covering 20-84 MHz using the recently completed Long Wavelength Array Station 1 (LWA1) radio telescope. In 10 hr of observations distributed over a 72 day period in fall of 2012, 33 giant pulses having peak flux densities between 400 Jy and 2000 Jy were detected. Twenty-two of these pulses were detected simultaneously in channels of 16 MHz bandwidth centered at 44 MHz, 60 MHz, and 76 MHz, including one pulse which was also detected in a channel centered at 28 MHz. We quantify statistics of pulse amplitude and pulse shape characteristics, including pulse broadening. Amplitude statistics are consistent with expectations based on extrapolations from previous work at higher and lower frequencies. Pulse broadening is found to be relatively high, but not significantly greater than expected. We present procedures that have been found to be effective for observing giant pulses in this frequency range.

  5. 250 MHz/GHz scintillation parameters in the equatorial, polar, and auroral environments. Environmental research papers

    SciTech Connect

    Basu; MacKenzie, E.; Basu; Costa, E.; Fougere, P.F.

    1986-03-28

    Ionospheric scintillation effects encountered in the equatorial-anomaly crest, polar-cap, and auroral regions have been contrasted to provide information for the design and evaluation of the performance of satellite communication links in these regions. The equatorial-anomaly region is identified as the most-disturbed irregularity environment where the amplitude and phase structures of VHF/L-band scintillations are primarily dictated by the strength of scattering rather than ionospheric motion. In the anomaly region, the spectra of intense amplitude scintillations at VHF and L-band are characterized by uniform power spectral density from the lowest frequency (10 MHz) to 4 Hz at VHF and to 1 Hz at L-band and steep rolloff at higher fluctuation frequencies with power law indices of -5 to 07. Such structures are compatible with intensity decorrelation times of 0.1 and 0.3 sec at VHF and L-band frequencies, respectively. The phase spectra are described by power-law variation of psd with frequency with typical spectral indices of -2. 4. The strong scattering at VHF induces extreme phase rates of 200 deg. in 0.1 sec. The 90th percentile values of rms phase deviation at 250 MHz with 100-sec detrend are found to be 16 rads in the early evening hours whereas amplitude scintillation can cover the entire dynamic range of 30 dB not only at 250 MHz but at L-band as well.

  6. 77 FR 45503 - 4.9 GHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-01

    ... errors in these provisions. These changes affecting the 4.9 GHz band in particular will improve spectrum... GHz Band AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: The Commission adopts...-4990 MHz (4.9 GHz) band applicants from certified frequency coordination. Next, the Commission...

  7. 47 CFR 25.254 - Special requirements for ancillary terrestrial components operating in the 1610-1626.5 MHz/2483.5...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ....C. 552(a) and 1 CFR part 51. Copies of this standard can be inspected at the Federal Communications... § 25.213 to protect radio astronomy service (RAS) observations in the 1610.6-1613.8 MHz band...

  8. 47 CFR 25.254 - Special requirements for ancillary terrestrial components operating in the 1610-1626.5 MHz/2483.5...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ....C. 552(a) and 1 CFR part 51. Copies of this standard can be inspected at the Federal Communications... § 25.213 to protect radio astronomy service (RAS) observations in the 1610.6-1613.8 MHz band...

  9. Nonthermal galactic emission below 10 MHz

    NASA Technical Reports Server (NTRS)

    Novaco, J. C.; Brown, L. W.

    1977-01-01

    The Radio Astronomy Explorer-2 (RAE-2) satellite has provided new measurements of the nonthermal galactic radio emission at frequencies below 10 MHz. Measurements of the emission spectra are presented for the center, anticenter, north polar, and south polar directions at 22 frequencies between 0.25 and 9.18 MHz. Survey maps of the spatial distribution of the observed low frequency galactic emission at 1.31, 2.20, 3.93, 4.70, 6.55, and 9.18 MHz are presented. The observations were obtained with the 229-meter traveling-wave V-antenna on this lunar orbiting spacecraft. The improved frequency coverage offers additional insights into structure of the local galactic neighborhood.

  10. BLAZAR SPECTRAL PROPERTIES AT 74 MHz

    SciTech Connect

    Massaro, F.; Funk, S.; Giroletti, M.; Paggi, A.; D'Abrusco, R.; Tosti, G.

    2013-10-01

    Blazars are the most extreme class of active galactic nuclei. Despite a previous investigation at 102 MHz for a small sample of BL Lac objects and our recent analysis of blazars detected in the Westerbork Northern Sky Survey, a systematic study of the blazar spectral properties at frequencies below 100 MHz has been never carried out. In this paper, we present the first analysis of the radio spectral behavior of blazars based on the recent Very Large Array Low-frequency Sky Survey (VLSS) at 74 MHz. We search for blazar counterparts in the VLSS catalog, confirming that they are detected at 74 MHz. We then show that blazars present radio-flat spectra (i.e., radio spectral indices of ∼0.5) when evaluated, which also about an order of magnitude in frequency lower than previous analyses. Finally, we discuss the implications of our findings in the context of the blazars-radio galaxies connection since the low-frequency radio data provide a new diagnostic tool to verify the expectations of the unification scenario for radio-loud active galaxies.

  11. Ultrahigh Frequency (100 MHz-300 MHz) Ultrasonic Transducers for Optical Resolution Medical Imagining.

    PubMed

    Fei, Chunlong; Chiu, Chi Tat; Chen, Xiaoyang; Chen, Zeyu; Ma, Jianguo; Zhu, Benpeng; Shung, K Kirk; Zhou, Qifa

    2016-01-01

    High resolution ultrasonic imaging requires high frequency wide band ultrasonic transducers, which produce short pulses and highly focused beam. However, currently the frequency of ultrasonic transducers is limited to below 100 MHz, mainly because of the challenge in precise control of fabrication parameters. This paper reports the design, fabrication, and characterization of sensitive broadband lithium niobate (LiNbO3) single element ultrasonic transducers in the range of 100-300 MHz, as well as their applications in high resolution imaging. All transducers were built for an f-number close to 1.0, which was achieved by press-focusing the piezoelectric layer into a spherical curvature. Characterization results demonstrated their high sensitivity and a -6 dB bandwidth greater than 40%. Resolutions better than 6.4 μm in the lateral direction and 6.2 μm in the axial direction were achieved by scanning a 4 μm tungsten wire target. Ultrasonic biomicroscopy images of zebrafish eyes were obtained with these transducers which demonstrate the feasibility of high resolution imaging with a performance comparable to optical resolution. PMID:27329379

  12. 47 CFR 15.231 - Periodic operation in the band 40.66-40.70 MHz and above 70 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... paragraph (e) of this section, the intentional radiator is restricted to the transmission of a control signal such as those used with alarm systems, door openers, remote switches, etc. Continuous transmissions, voice, video and the radio control of toys are not permitted. Data is permitted to be sent with...

  13. 47 CFR 15.231 - Periodic operation in the band 40.66-40.70 MHz and above 70 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.231... paragraph (e) of this section, the intentional radiator is restricted to the transmission of a control... two seconds per hour. (4) Intentional radiators which are employed for radio control purposes...

  14. 47 CFR 15.231 - Periodic operation in the band 40.66-40.70 MHz and above 70 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.231... paragraph (e) of this section, the intentional radiator is restricted to the transmission of a control... two seconds per hour. (4) Intentional radiators which are employed for radio control purposes...

  15. 47 CFR 15.231 - Periodic operation in the band 40.66-40.70 MHz and above 70 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional Provisions § 15.231... paragraph (e) of this section, the intentional radiator is restricted to the transmission of a control... two seconds per hour. (4) Intentional radiators which are employed for radio control purposes...

  16. 47 CFR 101.77 - Public safety licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses... communications carried on the facilities at issue involve safety of life and property. (b) A public...

  17. 47 CFR 101.77 - Public safety licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses... communications carried on the facilities at issue involve safety of life and property. (b) A public...

  18. 47 CFR 101.77 - Public safety licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses... communications carried on the facilities at issue involve safety of life and property. (b) A public...

  19. 47 CFR 101.77 - Public safety licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses... communications carried on the facilities at issue involve safety of life and property. (b) A public...

  20. 47 CFR 101.77 - Public safety licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses... communications carried on the facilities at issue involve safety of life and property. (b) A public...

  1. 47 CFR 101.81 - Future licensing in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses... secondary to ET operations, unless the incumbent affirmatively justifies primary status and the...

  2. 47 CFR 15.247 - Operation within the bands 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits, Additional... radiators that comply with the following provisions: (1) Frequency hopping systems shall have hopping... peak conducted output power of the intentional radiator shall not exceed the following: (1)...

  3. 78 FR 51559 - Commercial Operations in the 1695-1710 MHz, 1755-1780 MHz, and 2155-2180 MHz Bands

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-20

    ... available for public inspection during regular business hours in the FCC Reference Center, Federal... business hours in the FCC Reference Information Center, Room CY-A257, 445 12th Street SW., Washington, DC... in Rulemaking Proceedings, 63 FR 24121 (1998). All filings should reference the docket number in...

  4. The NATO III 5 MHz Distribution System

    NASA Technical Reports Server (NTRS)

    Vulcan, A.; Bloch, M.

    1981-01-01

    A high performance 5 MHz distribution system is described which has extremely low phase noise and jitter characteristics and provides multiple buffered outputs. The system is completely redundant with automatic switchover and is self-testing. Since the 5 MHz reference signals distributed by the NATO III distribution system are used for up-conversion and multiplicative functions, a high degree of phase stability and isolation between outputs is necessary. Unique circuit design and packaging concepts insure that the isolation between outputs is sufficient to quarantee a phase perturbation of less than 0.0016 deg when other outputs are open circuited, short circuited or terminated in 50 ohms. Circuit design techniques include high isolation cascode amplifiers. Negative feedback stabilizes system gain and minimizes circuit phase noise contributions. Balanced lines, in lieu of single ended coaxial transmission media, minimize pickup.

  5. ARM - Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers, 449 MHz Profiler(williams-449_prof)

    DOE Data Explorer

    Williams, Christopher; Jensen, Mike

    2012-11-06

    This data was collected by the NOAA 449-MHz and 2.8-GHz profilers in support of the Department of Energy (DOE) and NASA sponsored Mid-latitude Continental Convective Cloud Experiment (MC3E). The profiling radars were deployed in Northern Oklahoma at the DOE Atmospheric Radiation Mission (ARM) Southern Great Plans (SGP) Central Facility from 22 April through 6 June 2011. NOAA deployed three instruments: a Parsivel disdrometer, a 2.8-GHz profiler, and a 449-MHz profiler. The parasivel provided surface estimates of the raindrop size distribution and is the reference used to absolutely calibrate the 2.8 GHz profiler. The 2.8-GHz profiler provided unattenuated reflectivity profiles of the precipitation. The 449-MHz profiler provided estimates of the vertical air motion during precipitation from near the surface to just below the freezing level. By using the combination of 2.8-GHz and 449-MHz profiler observations, vertical profiles of raindrop size distributions can be retrieved. The profilers are often reference by their frequency band: the 2.8-GHz profiler operates in the S-band and the 449-MHz profiler operates in the UHF band. The raw observations are available as well as calibrated spectra and moments. This document describes how the instruments were deployed, how the data was collected, and the format of the archived data.

  6. The Expansion of Arecibo in Summer 2008: A Receiver at 600-1200 MHz

    NASA Astrophysics Data System (ADS)

    Jones, Kristen; Rajagopalan, G.; Whitlow, D.

    2009-01-01

    The purpose of this project is to investigate the radio frequency interference (RFI) environment seen through the Arecibo telescope and recommend necessary limits for a cooled receiver in the 600-1200 MHz regime. Preliminary discriminatory measurements were made using the Hilltop RFI Monitoring system. Strong TV and cell phone signals dominate the band from 450 to 1200 MHz. We seek to overcome this RFI for a number of reasons. It is feasible that the dish will see less troublesome RFI than the Hilltop Monitoring sees. Additionally, this region is astronomically essential, as it is ideal for both pulsar research and high z HI studies. We have constructed an antenna and receiver optimized in the 600-1200 MHz band and have installed them in the Gregorian Dome. We are currently working to focus and calibrate the receiver and to produce spectra across the band from sample regions of the entire Arecibo beam. This information will guide the limits and filters necessary to make a cooled receiver functional in this useful region. We graciously thank the National Science Foundation's Research Experience for Undergraduates program for funding this research.

  7. Search for 54-MHz Maser Emission from Interstellar Hydroxyl Using the Long Wavelength Array

    NASA Astrophysics Data System (ADS)

    Hoffman, Ian M.

    2015-01-01

    We present the results of an observational campaign using the Long Wavelength Array (LWA). The level splitting of the rotational ground state of the hydroxyl (OH) molecule gives rise to the four familiar 1.7-GHz (18-cm) transitions by which OH is known in the interstellar medium. There are also two magnetic-dipole transitions among these states at frequencies of 53.2 MHz and 55.1 MHz. These 54-MHz transitions have never been detected astronomically. Because of the relative weakness of the magnetic-dipole radiative process, it is expected that only maser emission will generate a detectable 54-MHz signal. Many of the prevailing pumping models for 18-cm masers are also suggestive of population inversions of the 54-MHz transitions. We have targeted our search toward Galactic locations that are known to exhibit strong 1720-MHz maser emission from OH with the expectation that either of the 54-MHz transitions will also be overpopulated.Using the LWA station LWA1, we have searched the sources NGC 7538, G33.64-0.21, W75N, and Sgr A. For each target we employed 20 hours of integration time in beam-formed mode. We employed 1024 spectral channels in a 250-kHz observing band for each of the two transitions, resulting in a velocity resolution of approximately 1.4 km/s. We did not detect masers in either transition toward any of the sources. Previously reported observations of W75N using LOFAR also resulted in a non-detection; none of the other sources have been searched previously for either 53.2- or 55.1-MHz emission. We discuss the results in the context of previous and ongoing searches for 54-MHz emission.This work is supported by Wittenberg University through the Physics Department. Construction of the LWA has been supported by the Office of Naval Research under Contract N00014-07-C-0147. Support for operations and continuing development of the LWA1 is provided by the National Science Foundation under grants AST-1139963 and AST-1139974 of the University Radio Observatory

  8. An X-band spacecraft transponder for deep space applications - Design concepts and breadboard performance

    NASA Technical Reports Server (NTRS)

    Mysoor, Narayan R.; Perret, Jonathan D.; Kermode, Arthur W.

    1992-01-01

    The design concepts and measured performance characteristics are summarized of an X band (7162 MHz/8415 MHz) breadboard deep space transponder (DSP) for future spacecraft applications, with the first use scheduled for the Comet Rendezvous Asteroid Flyby (CRAF) and Cassini missions in 1995 and 1996, respectively. The DST consists of a double conversion, superheterodyne, automatic phase tracking receiver, and an X band (8415 MHz) exciter to drive redundant downlink power amplifiers. The receiver acquires and coherently phase tracks the modulated or unmodulated X band (7162 MHz) uplink carrier signal. The exciter phase modulates the band (8415 MHz) downlink signal with composite telemetry and ranging signals. The receiver measured tracking threshold, automatic gain control, static phase error, and phase jitter characteristics of the breadboard DST are in good agreement with the expected performance. The measured results show a receiver tracking threshold of -158 dBm and a dynamic signal range of 88 dB.

  9. Design concepts and performance of NASA X-band transponder (DST) for deep space spacecraft applications

    NASA Technical Reports Server (NTRS)

    Mysoor, Narayan R.; Perret, Jonathan D.; Kermode, Arthur W.

    1991-01-01

    The design concepts and measured performance characteristics of an X band (7162 MHz/8415 MHz) breadboard deep space transponder (DST) for future spacecraft applications, with the first use scheduled for the Comet Rendezvous Asteroid Flyby (CRAF) and Cassini missions in 1995 and 1996, respectively. The DST consists of a double conversion, superheterodyne, automatic phase tracking receiver, and an X band (8415 MHz) exciter to drive redundant downlink power amplifiers. The receiver acquires and coherently phase tracks the modulated or unmodulated X band (7162 MHz) uplink carrier signal. The exciter phase modulates the X band (8415 MHz) downlink signal with composite telemetry and ranging signals. The receiver measured tracking threshold, automatic gain control static phase error, and phase jitter characteristics of the breadboard DST are in good agreement with the expected performance. The measured results show a receiver tracking threshold of -158 dBm and a dynamic signal range of 88 dB.

  10. A 900 MHz fractional-N synthesizer for UHF transceiver in 0.18 μm CMOS technology

    NASA Astrophysics Data System (ADS)

    Xurui, Mao; Beiju, Huang; Hongda, Chen

    2014-12-01

    A 900 MHz fractional-N synthesizer is designed for the UHF transceiver. The VCO with a 4 bits capacitor bank covers 823-1061 MHz that implements 16 (24) sub-bands. A 7/8 dual-modulus prescaler is implemented with a phase-switching circuit and high-speed flip—flops, which are composed of source coupled logic. The proposed synthesizer phase-locked loop is demonstrated with a 50 kHz band width by a low 12.95 MHz reference clock, and offers a better phase noise and band width tradeoff. To reduce the out-band phase noise, a 4-levels 3-order single-loop sigma—delta modulator is applied. When its relative frequency resolution is settled to 10-6, the testing results show that the phase noises are -120.6 dBc/Hz at 1 MHz and -95.0 dBc/Hz at 100 kHz. The chip is 2.1 mm2 in UMC 0.18 μm CMOS. The power is 36 mW at a 1.8 V supply.

  11. 75 FR 45496 - Amendment of the Commission's Rules to Accommodate 30 Megahertz Channels in the 6525-6875 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-03

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Part 101 Amendment of the Commission's Rules to Accommodate 30 Megahertz Channels in the 6525 6875 MHz Band; and to Provide for Conditional Authorization on Additional Channels in the 21.8...

  12. 47 CFR 25.221 - Blanket Licensing provisions for Earth Stations on Vessels (ESVs) receiving in the 3700-4200 MHz...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...-6425 MHz (Earth-to-space) band, operating with GSO Satellites in the Fixed-Satellite Service. 25.221... SATELLITE COMMUNICATIONS Technical Standards § 25.221 Blanket Licensing provisions for Earth Stations on... (Earth-to-space) band, operating with GSO Satellites in the Fixed-Satellite Service. (a) The...

  13. Miniaturized bendable 400 MHz artificial magnetic conductor

    NASA Astrophysics Data System (ADS)

    Presse, Anthony; Tarot, Anne-Claude

    2016-04-01

    A bendable artificial magnetic conductor (AMC) with a resonant frequency of 400 MHz is proposed. The dimensions of the unit cell are 50 × 50 mm2 or 0.07 × 0.07 λ0. The miniaturization is achieved with closely coupled patches printed on each side of a 0.127-mm-thick dielectric substrate. This last one is stacked on a flexible 3-mm-thick silicone over a ground plane. An AMC prototype is simulated and manufactured. Also, a printed inverted-F antenna is used to highlight the bandwidth of the AMC.

  14. 76 FR 56657 - Unlicensed Operation in the TV Broadcast Bands

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-14

    ... FR 75814, December 6, 2010, are effective on September 14, 2011. FOR FURTHER INFORMATION CONTACT: For... Devices Below 900 MHz and in the 3 GHz Band, ET Docket Nos. 04-186 and 02-380; FCC 10-174, 75 FR 75814... COMMISSION 47 CFR Parts 0 and 15 Unlicensed Operation in the TV Broadcast Bands AGENCY:...

  15. 76 FR 67070 - Operation of Wireless Communications Services in the 2.3 GHz Band; Establishment of Rules and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-31

    ...), 27.73(a), and 27.73(b) of the Commission's rules published at 75 FR 45058, August 2, 2010, are... and Policies for the Digital Audio Radio Satellite Service in the 2310-2360 MHz Frequency Band AGENCY... Audio Radio Satellite Service in the 2310-2360 MHz Frequency Band (WCS and SDARS) proceeding, to...

  16. DSS-13 S-/X-band microwave feed system

    NASA Astrophysics Data System (ADS)

    Manshadi, F.

    1994-05-01

    The configuration, detail design, and performance of the dual S-/X-band microwave feed system for the new DSN beam-waveguide antenna, Deep Space Station (DSS) 13, are reported. By using existing spare components, reducing fabrication cost of new components by simplifying their design, and using new fabrication techniques and material, this DSS-13 feed system was implemented successfully with a small budget and a very tight schedule. Measured noise temperature gains of the feed system are 17.5 K for S-band (2200-2300 MHz) and 24.0 K for X-band (8200-8600 MHz), which agree very closely with the predicted performance.

  17. DSS-13 S-/X-Band Microwave Feed System

    NASA Astrophysics Data System (ADS)

    Manshadi, F.

    1994-01-01

    The configuration, detail design, and performance of the dual S-/X-band microowave feed system for the new DSN beam-waveguide antenna, Deep Space Station (DSS) 13, are reported. By using existing spare components, reducing fabrication cost of new components by simplifying their design, and using new fabrication techiques and material, this BSS-13 feed system was implemented successfully with a small budget and a very tight schedule. Measured noise temperature gains of the feed system are 17.5 K for S-band (2200-2300 MHz) and 24.0 K for X-band (8200-8600 MHz), which agree very closely with the predicted performance.

  18. Superconducting 112 MHz QWR electron gun

    SciTech Connect

    Belomestnykh, S.; Ben-Zvi, I.; Boulware, C.H.; Chang, X.; Grimm, T.L.; Rao, T.; Siegel, B.; Skaritka, J.; Than, R.; Winowski, M.; Wu, Q.; Xin, T.; Xue, L.

    2011-07-25

    Brookhaven National Laboratory and Niowave, Inc. have designed and fabricated a superconducting 112 MHz quarter-wave resonator (QWR) electron gun. The first cold test of the QWR cryomodule has been completed at Niowave. The paper describes the cryomodule design, presents the cold test results, and outline plans to upgrade the cryomodule. Future experiments include studies of different photocathodes and use for the coherent electron cooling proof-of-principle experiment. Two cathode stalk options, one for multi-alkali photocathodes and the other one for a diamond-amplified photocathode, are discussed. A quarter-wave resonator concept of superconducting RF (SRF) electron gun was proposed at BNL for electron cooling hadron beams in RHIC. QWRs can be made sufficiently compact even at low RF frequencies (long wavelengths). The long wavelength allows to produce long electron bunches, thus minimizing space charge effects and enabling high bunch charge. Also, such guns should be suitable for experiments requiring high average current electron beams. A 112 MHz QWR gun was designed, fabricated, and cold-tested in collaboration between BNL and Niowave. This is the lowest frequency SRF gun ever tested successfully. In this paper we describe the gun design and fabrication, present the cold test results, and outline our plans. This gun will also serve as a prototype for a future SRF gun to be used for coherent electron cooling of hadrons in eRHIC.

  19. A Four Channel 250 MHz Visual Counter

    SciTech Connect

    Flores, I.; Blando, P.; Crawford, H.; Engelage, J.; Greiner, L.; Ko, S.; Krebs, G.; Visser, G.

    1992-04-01

    A visual counter rated at 250 mhz. with a pulse-pair resolution of 2.6 nanoseconds for nuclear instrument module (NIM) signals has been designed. Pulse widths for NIM signals must be equal to or greater than 2 ns. The counter has a separate input for transistor-transistor logic (TTL) signals and for this logic level it operates at rates equal to or less than 190 mhz. TTL pulses must be greater than 4 ns. The design was implemented on a printed circuit card. Four of these cards were packaged into a single unit resulting in a four channel device that can be mounted into a 19 inch rack. Seven units were built; they are presently used in the experimental area and in the Main Control Room of the Bevalac. The counter accepts well defined NIM or TTL signals internally terminated with 50 ohms. All the controls and the signal input connectors are located on the front panel. An Overflow output, Gate, and Reset inputs are located on the back panel. The counters have 8 Light Emitting Diode digit displays which are 20.3 mm high with a viewing distance rating of 10 meters. Light filters are used for the LED displays greatly enhancing their visibility.

  20. 1800 MHz in vitro exposure device for experimental studies on the effects of mobile communication systems.

    PubMed

    Ardoino, L; Lopresto, V; Mancini, S; Pinto, R; Lovisolo, G A

    2004-01-01

    A wire patch cell (WPC) operating at the uplink frequency band of GSM 1800 MHz has been designed for in vitro experiments with the aim of investigating the possible biological effects of electromagnetic radiation associated with cellular phones. The 1800 MHz WPC design is a direct descendant of the original 900 MHz WPC introduced by Laval et al. This system provides a homogeneous specific absorption rate distribution, using four 3.5 cm petri dishes simultaneously. Numerical dosimetry has been performed using a commercial code (CST Microwave Studio), in order to evaluate accurately the efficiency of the structure (in terms of W kg(-1) per 1 W input power) and the distribution in the chosen biological target. The numerical results have been confirmed by experimental measurements performed by measuring thermal increase due to a high power impulse. The efficiency of the structure is 1.25 +/- 25% W kg(-1) per 1 W input power higher than the efficiency of the 900 MHz WPC. A few adjustments have been made in order to use the WPC in a standard incubator and to avoid thermal increases related to the radio frequency exposure. This exposure system has been adopted for the experiments scheduled in the RAMP and GUARD projects (VFPE).

  1. Pilot observations at 74 MHz for global 21cm cosmology with the Parkes 64 m

    NASA Astrophysics Data System (ADS)

    Bannister, Keith; McConnell, David; Reynolds, John; Chippendale, Aaron; Landecker, Tom L.; Dunning, Alex

    2013-10-01

    We propose a single pilot observing session using the existing 74 MHz feed at Parkes to evaluate tools and techniques to optimise low frequency (44-88 MHz) observing. 1. A continuum map of the diffuse emission in the Southern sky at 74 MHz. Such a map would be of great help to single-dipole 21cm cosmology experiments, whose diffuse Galactic foregrounds are currently poorly constrained (Pritchard & Loeb, 2010b; de Oliveira-Costa et al., 2008). 2. A wideband (44-88 MHz) map of of the Southern sky, which can be used as a direct detection of the dark ages global signal. Recent theoretical work has shown that the Parkes aperture of 64 m is the optimal size for such a direct detection, which could be achieved at 25? in as little as 100 hrs of observing (Liu et al., 2012). After receiving a 4.1 grade in the previous round, our observations were not scheduled due to limited receiver changes. We are therefore re-proposing as formality. Since the proposal, we have obtained RFI measurements with the feed pointed at zenith. We are confident the dominant source of RFI can be found and removed. If observing at this band is possible, at least two scientific outputs relevant to global 21cm cosmology (among many others) are put within reach:

  2. TEM Cell Testing of Cable Noise Reduction Techniques from 2 MHz to 200 MHz -- Part 2

    NASA Technical Reports Server (NTRS)

    Bradley, Arthur T.; Evans, William C.; Reed, Joshua L.; Shimp, Samuel K., III; Fitzpatrick, Fred D.

    2008-01-01

    This paper presents empirical results of cable noise reduction techniques as demonstrated in a TEM cell operating with radiated fields from 2 - 200 MHz. It is the second part of a two-paper series. The first paper discussed cable types and shield connections. In this second paper, the effects of load and source resistances and chassis connections are examined. For each topic, well established theories are compared to data from a real-world physical system. Finally, recommendations for minimizing cable susceptibility (and thus cable emissions) are presented. There are numerous papers and textbooks that present theoretical analyses of cable noise reduction techniques. However, empirical data is often targeted to low frequencies (e.g. <50 KHz) or high frequencies (>100 MHz). Additionally, a comprehensive study showing the relative effects of various noise reduction techniques is needed. These include the use of dedicated return wires, twisted wiring, cable shielding, shield connections, changing load or source impedances, and implementing load- or source-to-chassis isolation. We have created an experimental setup that emulates a real-world electrical system, while still allowing us to independently vary a host of parameters. The goal of the experiment was to determine the relative effectiveness of various noise reduction techniques when the cable is in the presence of radiated emissions from 2 MHz to 200 MHz.

  3. Pulsar polarisation below 200 MHz: Average profiles and propagation effects

    NASA Astrophysics Data System (ADS)

    Noutsos, A.; Sobey, C.; Kondratiev, V. I.; Weltevrede, P.; Verbiest, J. P. W.; Karastergiou, A.; Kramer, M.; Kuniyoshi, M.; Alexov, A.; Breton, R. P.; Bilous, A. V.; Cooper, S.; Falcke, H.; Grießmeier, J.-M.; Hassall, T. E.; Hessels, J. W. T.; Keane, E. F.; Osłowski, S.; Pilia, M.; Serylak, M.; Stappers, B. W.; ter Veen, S.; van Leeuwen, J.; Zagkouris, K.; Anderson, K.; Bähren, L.; Bell, M.; Broderick, J.; Carbone, D.; Cendes, Y.; Coenen, T.; Corbel, S.; Eislöffel, J.; Fender, R.; Garsden, H.; Jonker, P.; Law, C.; Markoff, S.; Masters, J.; Miller-Jones, J.; Molenaar, G.; Osten, R.; Pietka, M.; Rol, E.; Rowlinson, A.; Scheers, B.; Spreeuw, H.; Staley, T.; Stewart, A.; Swinbank, J.; Wijers, R.; Wijnands, R.; Wise, M.; Zarka, P.; van der Horst, A.

    2015-04-01

    Aims: We present the highest-quality polarisation profiles to date of 16 non-recycled pulsars and four millisecond pulsars, observed below 200 MHz with the LOFAR high-band antennas. Based on the observed profiles, we perform an initial investigation of expected observational effects resulting from the propagation of polarised emission in the pulsar magnetosphere and the interstellar medium. Methods: The polarisation data presented in this paper have been calibrated for the geometric-projection and beam-shape effects that distort the polarised information as detected with the LOFAR antennas. We have used RM Synthesis to determine the amount of Faraday rotation in the data at the time of the observations. The ionospheric contribution to the measured Faraday rotation was estimated using a model of the ionosphere. To study the propagation effects, we have compared our low-frequency polarisation observations with archival data at 240, 400, 600, and 1400 MHz. Results: The predictions of magnetospheric birefringence in pulsars have been tested using spectra of the pulse width and fractional polarisation from multifrequency data. The derived spectra offer only partial support for the expected effects of birefringence on the polarisation properties, with only about half of our sample being consistent with the model's predictions. It is noted that for some pulsars these measurements are contaminated by the effects of interstellar scattering. For a number of pulsars in our sample, we have observed significant variations in the amount of Faraday rotation as a function of pulse phase, which is possibly an artefact of scattering. These variations are typically two orders of magnitude smaller than that observed at 1400 MHz by Noutsos et al. (2009), for a different sample of southern pulsars. In this paper we present a possible explanation for the difference in magnitude of this effect between the two frequencies, based on scattering. Finally, we have estimated the magnetospheric

  4. Miniaturized differentially fed dual-band implantable antenna: Design, realization, and in vitro test

    NASA Astrophysics Data System (ADS)

    Lei, Wen; Guo, Yong-Xin

    2015-10-01

    A differentially fed dual-band implantable antenna is designed in this paper, with an additional shorting strip to achieve a size reduction. The antenna has been simulated by using one-layer and multilayer tissue models and a human anatomical model. The prototype model is fabricated and in vitro demonstrated with skin-mimicking phantoms, which experimentally achieves impedance bandwidths of 32 MHz at 401-406 MHz Medical Device Radiocommunications Service band and 151 MHz at 2.4-2.48 GHz Industrial, Scientific, and Medical band. Radiation characteristic has been evaluated in Computer Simulation Technology (CST) human voxel model.

  5. Dual-band bandpass filter using composite metamaterial resonator

    NASA Astrophysics Data System (ADS)

    Jin, Yu-Ting; Si, Li-Ming; Zhang, Qing-Le; Wu, Yu-Ming; Lv, Xin

    2016-03-01

    A dual-band bandpass filter at X-band is proposed using composite metamaterial resonator consisting of an outer square closed-ring resonator (SCRR) and two inner electric inductance-capacitance (ELC) resonators. Numerical simulation and microwave measurement reveal that the filter exhibits two passbands centered at 8.76 GHz and 11.04 GHz, with 3 dB bandwidths of 130 MHz and 290 MHz, respectively. The complex dispersion relation of the filter is further derived based on the effective medium theory, where two balanced composite right-/left-handed bands are found, i.e. lines exhibiting two left-handed and two right-handed bands alternating. The proposed filter may find useful in dual-band or multi-band wireless communication systems.

  6. Gastric Banding

    MedlinePlus

    ... gastric banding before deciding to have the procedure. Advertisements for a device or procedure may not include ... feeds Follow FDA on Twitter Follow FDA on Facebook View FDA videos on YouTube View FDA photos ...

  7. BNL 703 MHz SRF cryomodule demonstration

    SciTech Connect

    Burrill,A.; Ben-Zvi, I.; Calaga, R.; Dalesio, L.; Dottavio, T.; Gassner, D.; Hahn, H.; Hoff, L.; Kayran, D.; Kewisch, J.; Lambiase, R.; Lederle, d.; Litvinenko, v.; Mahler, G.; McIntyre, G.; et al.

    2009-05-04

    This paper will present the preliminary results of the testing of the 703 MHz SRF cryomodule designed for use in the ampere class ERL under construction at Brookhaven National Laboratory. The preliminary cavity tests, carried out at Thomas Jefferson Laboratory, demonstrated cavity performance of 20 MV/m with a Qo of 1 x 10{sup 10}, results we expect to reproduce in the horizontal configuration. This test of the entire string assembly will allow us to evaluate all of the additional cryomodule components not previously tested in the VTA and will prepare us for our next milestone test which will be delivery of electrons from our injector through the cryomodule to the beam dump. This will also be the first demonstration of an accelerating cavity designed for use in an ampere class ERL, a key development which holds great promise for future machines.

  8. Compact Miniaturized Antenna for 210 MHz RFID

    NASA Technical Reports Server (NTRS)

    Lee, Richard Q.; Chun, Kue

    2008-01-01

    This paper describes the design and simulation of a miniaturized square-ring antenna. The miniaturized antenna, with overall dimensions of approximately one tenth of a wavelength (0.1 ), was designed to operate at around 210 MHz, and was intended for radio-frequency identification (RFID) application. One unique feature of the design is the use of a parasitic element to improve the performance and impedance matching of the antenna. The use of parasitic elements to enhance the gain and bandwidth of patch antennas has been demonstrated and reported in the literature, but such use has never been applied to miniaturized antennas. In this work, we will present simulation results and discuss design parameters and their impact on the antenna performance.

  9. Adaptive optics optical coherence tomography at 1 MHz.

    PubMed

    Kocaoglu, Omer P; Turner, Timothy L; Liu, Zhuolin; Miller, Donald T

    2014-12-01

    Image acquisition speed of optical coherence tomography (OCT) remains a fundamental barrier that limits its scientific and clinical utility. Here we demonstrate a novel multi-camera adaptive optics (AO-)OCT system for ophthalmologic use that operates at 1 million A-lines/s at a wavelength of 790 nm with 5.3 μm axial resolution in retinal tissue. Central to the spectral-domain design is a novel detection channel based on four high-speed spectrometers that receive light sequentially from a 1 × 4 optical switch assembly. Absence of moving parts enables ultra-fast (50ns) and precise switching with low insertion loss (-0.18 dB per channel). This manner of control makes use of all available light in the detection channel and avoids camera dead-time, both critical for imaging at high speeds. Additional benefit in signal-to-noise accrues from the larger numerical aperture afforded by the use of AO and yields retinal images of comparable dynamic range to that of clinical OCT. We validated system performance by a series of experiments that included imaging in both model and human eyes. We demonstrated the performance of our MHz AO-OCT system to capture detailed images of individual retinal nerve fiber bundles and cone photoreceptors. This is the fastest ophthalmic OCT system we know of in the 700 to 915 nm spectral band.

  10. Solar S-bursts at Frequencies of 10 - 30 MHz

    NASA Astrophysics Data System (ADS)

    Melnik, V. N.; Konovalenko, A. A.; Rucker, H. O.; Dorovskyy, V. V.; Abranin, E. P.; Lecacheux, A.; Lonskaya, A. S.

    2010-06-01

    Solar S-bursts observed by the radio telescope UTR-2 in the period 2001 - 2002 are studied. The bursts chosen for a detailed analysis occurred in the periods 23 - 26 May 2001, 13 - 16 and 27 - 39 July 2002 during three solar radio storms. More than 800 S-bursts were registered in these days. Properties of S-bursts are studied in the frequency band 10 - 30 MHz. All bursts were always observed against a background of other solar radio activity such as type III and IIIb bursts, type III-like bursts, drift pairs and spikes. Moreover, S-bursts were observed during days when the active region was situated near the central meridian. Characteristic durations of S-bursts were about 0.35 and 0.4 - 0.6 s for the May and July storms, respectively. For the first time, we found that the instantaneous frequency width of S-bursts increased with frequency linearly. The dependence of drift rates on frequency followed the McConnell dependence derived for higher frequencies. We propose a model of S-bursts based on the assumption that these bursts are generated due to the confluence of Langmuir waves with fast magnetosonic waves, whose phase and group velocities are equal.

  11. Shift Register Clock Rate Effects on Coincidence Collection 50MHz versus 4MHz Comparison Tests

    SciTech Connect

    Newell, Matthew R.; Bourret, Steven C.; Swinhoe, Martyn Thomas

    2015-11-03

    The following report identifies and quantifies the timing differences between the older slower Shift Register Coincidence/Multiplicity modules and today’s modern higher speed devices. Modern high speed Shift Register Coincidence/Multiplicity instruments employ high speed internal clocks that run at frequencies more than ten times the older units, typically 50MHz. These higher speed clocks allow for a finer time resolution when recording input pulses.

  12. Ku-band miniature modulators

    NASA Technical Reports Server (NTRS)

    Ernst, R. L.

    1973-01-01

    Ku-band microminiature modulators were designed to convert a 10 mW signal at 400 MHz to a 10 mW signal at 15 GHz. The designs incorporate gallium arsenide Schottky barrier varactors used in upper-sideband up-converters. The use of Ku-band microstrip circulators and hairpin resonator bandpass filters at 2.1 GHz and 2.5 GHz is included. The design and fabrication of a single up-conversion unit with a double up-conversion unit are compared. Various filter configurations are studies, and the use of both alumina and quartz substrates are considered. The various impedance matching networks are evaluated using computer aided design techniques.

  13. Ka-Band Atmospheric Noise Temperature Measurements Using a 34-Meter Beam-Waveguide Antenna

    NASA Technical Reports Server (NTRS)

    Morabito, D.; Clauss, B.; Speranza, M.

    1997-01-01

    (viewgraphs) NASA's Deep space missions have used 960 MHz, 2.3 GHz, and 8.4 GHz for spacecraft communication downlinks. Ka-band (32 GHz) is being considered as a downlink frequency for future flight projects.

  14. Fast 704 MHz Ferroelectric Tuner for Superconducting Cavities

    SciTech Connect

    Jay L. Hirshfield

    2012-04-12

    The Omega-P SBIR project described in this Report has as its goal the development, test, and evaluation of a fast electrically-controlled L-band tuner for BNL Energy Recovery Linac (ERL) in the Electron Ion Collider (EIC) upgrade of the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL). The tuner, that employs an electrically-controlled ferroelectric component, is to allow fast compensation to cavity resonance changes. In ERLs, there are several factors which significantly affect the amount of power required from the wall-plug to provide the RF-power level necessary for the operation. When beam loading is small, the power requirements are determined by (i) ohmic losses in cavity walls, (ii) fluctuations in amplitude and/or phase for beam currents, and (iii) microphonics. These factors typically require a substantial change in the coupling between the cavity and the feeding line, which results in an intentional broadening of the cavity bandwidth, which in turn demands a significant amount of additional RF power. If beam loading is not small, there is a variety of beam-drive phase instabilities to be managed, and microphonics will still remain an issue, so there remain requirements for additional power. Moreover ERL performance is sensitive to changes in beam arrival time, since any such change is equivalent to phase instability with its vigorous demands for additional power. In this Report, we describe the new modular coaxial tuner, with specifications suitable for the 704 MHz ERL application. The device would allow changing the RF-coupling during the cavity filling process in order to effect significant RF power savings, and also will provide rapid compensation for beam imbalance and allow for fast stabilization against phase fluctuations caused by microphonics, beam-driven instabilities, etc. The tuner is predicted to allow a reduction of about ten times in the required power from the RF source, as compared to a compensation system

  15. Development and Production of a 201 MHz, 5.0 MW Peak Power Klystron

    SciTech Connect

    Aymar, Galen; Eisen, Edward; Stockwell, Brad; Begum, rasheda; Lenci, Steve; Eisner, Rick; Cesca, Eugene

    2016-01-01

    Communications & Power Industries LLC has designed and manufactured the VKP-8201A, a high peak power, high gain, VHF band klystron. The klystron operates at 201.25 MHz, with 5.0 MW peak output power, 34 kW average output power, and a gain of 36 dB. The klystron is designed to operate between 1.0 MW and 4.5 MW in the linear range of the transfer curve. The klystron utilizes a unique magnetic field which enables the use of a proven electron gun design with a larger electron beam requirement. Experimental and predicted performance data are compared.

  16. A compact 500 MHz 4 kW Solid-State Power Amplifier for accelerator applications

    NASA Astrophysics Data System (ADS)

    Gaspar, M.; Pedrozzi, M.; Ferreira, L. F. R.; Garvey, T.

    2011-05-01

    We present the development of a compact narrow-band Solid-State Power Amplifier (SSPA). We foresee a promising application of solid-state amplifiers specifically in accelerators for new generation synchrotron light sources. Such a new technology has reached a competitive price/performance ratio and expected lifetime in comparison with klystron and IOT amplifiers. The increasing number of synchrotron light sources using 500 MHz as base frequency justifies the effort in the development of the proposed amplifier. Two different techniques are also proposed to improve the control and performance of these new distributed amplification systems which we call, respectively, complete distributed system and forced compression.

  17. Multipacting Simulation Study for 56 MHz Quarter Wave Resonator using 2D Code

    SciTech Connect

    Naik,D.; Ben-Zvi, I.

    2009-01-02

    A beam excited 56 MHz Radio Frequency (RF) Niobium Quarter Wave Resonator (QWR) has been proposed to enhance RHIC beam luminosity and bunching. Being a RF cavity, multipacting is expected; therefore an extensive study was carried out with the Multipac 2.1 2D simulation code. The study revealed that multipacting occurs in various bands up to peak surface electric field 50 kV/m and is concentrated mostly above the beam gap and on the outer conductor. To suppress multipacting, a ripple structure was introduced to the outer conductor and the phenomenon was successfully eliminated from the cavity.

  18. 47 CFR 15.233 - Operation within the bands 43.71-44.49 MHz, 46.60-46.98 MHz, 48.75-49.51 MHz and 49.66-50.0 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ....100 8 44.160 49.160 9 44.180 49.200 10 44.200 49.240 11 44.320 49.280 12 44.360 49.360 13 44.400 49... operated equipment, the equipment tests shall be performed using a new battery. (h) For cordless...

  19. 47 CFR 15.233 - Operation within the bands 43.71-44.49 MHz, 46.60-46.98 MHz, 48.75-49.51 MHz and 49.66-50.0 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits...) An intentional radiator used as part of a cordless telephone system shall operate centered on one...

  20. 47 CFR 15.233 - Operation within the bands 43.71-44.49 MHz, 46.60-46.98 MHz, 48.75-49.51 MHz and 49.66-50.0 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits...) An intentional radiator used as part of a cordless telephone system shall operate centered on one...

  1. 47 CFR 15.233 - Operation within the bands 43.71-44.49 MHz, 46.60-46.98 MHz, 48.75-49.51 MHz and 49.66-50.0 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits...) An intentional radiator used as part of a cordless telephone system shall operate centered on one...

  2. 47 CFR 15.233 - Operation within the bands 43.71-44.49 MHz, 46.60-46.98 MHz, 48.75-49.51 MHz and 49.66-50.0 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... COMMUNICATIONS COMMISSION GENERAL RADIO FREQUENCY DEVICES Intentional Radiators Radiated Emission Limits...) An intentional radiator used as part of a cordless telephone system shall operate centered on one...

  3. 47 CFR 95.628 - MedRadio transmitters in the 413-419 MHz, 426-432 MHz, 438-444 MHz, and 451-457 MHz bands.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...) signal level greater than −60 dBm as received by a 0 dBi gain antenna in any 12.5 kHz bandwidth within.... The monitoring system antenna shall be the antenna used by the programmer/control transmitter for a... more than 50 milliseconds in duration) signal level greater than −60 dBm as received by a 0 dBi...

  4. 75 FR 56533 - Wireless Telecommunications Bureau Postpones Auction of 218-219 MHz Service and Phase II 220 MHz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-16

    ... COMMISSION Wireless Telecommunications Bureau Postpones Auction of 218-219 MHz Service and Phase II 220 MHz... document announces the postponement of Auction 89. FOR FURTHER INFORMATION CONTACT: Wireless... related documents are also available on the Internet at the Commission's Web site:...

  5. Imaging melanin cancer growth in-vivo using raster-scan optoacoustic mesoscopy (RSOM) at 50 MHz and 100 MHz

    NASA Astrophysics Data System (ADS)

    Omar, Murad; Schwarz, Mathias; Soliman, Dominik; Symvoulidis, Panagiotis; Ntziachristos, Vasilis

    2016-03-01

    We used raster-scan optoacoustic mesoscopy (RSOM) at 50 MHz, and at 100 MHz, to monitor tumor growth, and tumor angiogenesis, which is a central hallmark of cancer, in-vivo. In this study we compared the performance, and the effect of the 50 MHz, and the 100 MHz frequencies on the quality of the final image. The system is based on a reflection-mode implementation of RSOM. The detectors used are custom made, ultrawideband, and spherically focused. The use of such detectors enables light coupling from the same side as the detector, thus reflection-mode. Light is in turn coupled using a fiber bundle, and the detector is raster scanned in the xy-plane. Subsequently, to retrieve small features, the raw data are reconstructed using a multi-bandwidth, beamforming reconstruction algorithm. Comparison of the system performance at the different frequencies shows as expected a higher resolution in case of the 100 MHz detector compared to the 50 MHz. On the other hand the 50 MHz has a better SNR, can detect features from deeper layers, and has higher angular acceptance. Based on these characteristics the 50 MHz detector was mostly used. After comparing the performance we monitored the growth of B16F10 cells, melanin tumor, over the course of 9 days. We see correspondence between the optoacoustic measurements and the cryoslice validations. Additionally, in areas close to the tumor we see sprouting of new vessels, starting at day 4-5, which corresponds to tumor angiogenesis.

  6. TEM Cell Testing of Cable Noise Reduction Techniques From 2 MHz to 200 MHz - Part 1

    NASA Technical Reports Server (NTRS)

    Bradley, Arthur T.; Evans, William C.; Reed, Joshua L.; Shimp, Samuel K.; Fitzpatrick, Fred D.

    2008-01-01

    This paper presents empirical results of cable noise reduction techniques as demonstrated in a TEM cell operating with radiated fields from 2 - 200 MHz. It is the first part of a two-paper series. This first paper discusses cable types and shield connections. In the second paper, the effects of load and source resistances and chassis connections are examined. For each topic, well established theories are compared to data from a real-world physical system. Finally, recommendations for minimizing cable susceptibility (and thus cable emissions) are presented. There are numerous papers and textbooks that present theoretical analyses of cable noise reduction techniques. However, empirical data is often targeted to low frequencies (e.g. <50 KHz) or high frequencies (>100 MHz). Additionally, a comprehensive study showing the relative effects of various noise reduction techniques is needed. These include the use of dedicated return wires, twisted wiring, cable shielding, shield connections, changing load or source impedances, and implementing load- or source-to-chassis isolation. We have created an experimental setup that emulates a real-world electrical system, while still allowing us to independently vary a host of parameters. The goal of the experiment was to determine the relative effectiveness of various noise reduction techniques when the cable is in the presence of radiated emissions from 2 MHz to 200 MHz. The electronic system (Fig. 1) consisted of two Hammond shielded electrical enclosures, one containing the source resistance, and the other containing the load resistance. The boxes were mounted on a large aluminium plate acting as the chassis. Cables connecting the two boxes measured 81 cm in length and were attached to the boxes using standard D38999 military-style connectors. The test setup is shown in Fig. 2. Electromagnetic fields were created using an HP8657B signal generator, MiniCircuits ZHL-42W-SMA amplifier, and an EMCO 5103 TEM cell. Measurements were

  7. Untersuchung der Störwirkung von LTE auf SRD Anwendungen bei 868 MHz

    NASA Astrophysics Data System (ADS)

    Welpot, M.; Wunderlich, S.; Gaspard, I.

    2014-11-01

    Moderne Hausautomatisierungssysteme, Alarmanlagen oder auch Funk-Zugangssysteme in Haus und Automobil setzen auf frei nutzbare Frequenzen in ISM/SRD-Bändern. Die rasante Zunahme an privaten und kommerziell genutzten Applikationen im SRD-Band bei 868 MHz und der Ausbau der LTE-Mobilfunknetze im Frequenzbereich unterhalb von 1 GHz ("Digital Dividend") wirft zunehmend die Frage nach der Funkverträglichkeit dieser Systeme untereinander auf. Während die SRD-Funkmodule auf eine geringe Sendeleistung von ~ +14 dBm beschränkt sind (Ralf and Thomas, 2009), beträgt die maximale LTE-Sendeleistung im Uplink nach (ETSI-Norm, 2011) +23 dBm. Zusammen mit der Einführung von LTE im Frequenzbereich unterhalb 1 GHz als DSL-Ersatz vor allem in ländlichen Gebieten, ergibt sich damit als mögliches Störszenario, dass durch die Aussendung des LTE-Endgerätes im Bereich von ca. 850 MHz die SRD-Funkverbindungen bei 868 MHz insbesondere dann gestört werden, wenn die Antennen beider Funksysteme räumlich nahe zueinander angeordnet sind und folglich nur eine geringe zusätzliche Entkopplung der Systeme bieten. In der vorliegenden Arbeit wird das LTE-Störpotential auf SRD-Empfänger praxisnah untersucht.

  8. Investigation of radio astronomical windows between 1 MHz and 2060 MHz in Universiti Malaya, Malaysia

    NASA Astrophysics Data System (ADS)

    Abidin, Zamri Zainal; Ibrahim, Zainol Abidin; Adnan, Syed Bahari Ramadzan Syed; Anuar, Norwati Khairul

    2009-08-01

    An indoor and an outdoor radio frequency survey was conducted in Universiti Malaya, Malaysia, as a test site, for the purpose of developing radio astronomy research in Malaysia. This is the first radio astronomical survey of any such done in Malaysia. Observation and analysis were done in the radio frequency spectrum between 1 MHz and 2060 MHz. In this paper, the experimental setup and procedure of surveying are outlined and the measured data are interpreted. The eight radio astronomical windows were investigated from a 24 h observation, with the emphasis on two of the most important radio astronomical windows which are protected by the Malaysian Communications and Multimedia Commission (MCMC). Some intermittent observations were also done for referencing purposes. The radio frequency interferences (RFIs) are found to be relatively low. The overall relative Interference-to-Noise ratio (INR) at this test site ranges between 5.72% and 11.74%. The average strength of RFI in the eight focused radio astronomical windows at this site ranges between -100 dBm and -90 dBm (equivalently between 9.23 × 10 4 Jy and 93.29 × 10 4 Jy at resolution bandwidth of 125 kHz).

  9. Laparoscopic gastric banding

    MedlinePlus

    ... adjustable gastric banding; Bariatric surgery - laparoscopic gastric banding; Obesity - gastric banding; Weight loss - gastric banding ... gastric banding is not a "quick fix" for obesity. It will greatly change your lifestyle. You must ...

  10. An inexpensive 15 MHz fiber optic analog data link

    NASA Astrophysics Data System (ADS)

    Lagerstroem, E.; Kindberg, G.; Haegerstroem, G.; Drake, J. R.

    1982-03-01

    Circuit diagrams for the transmitter and receiver for an analog data link are presented. Analog signals are transmitted over distances of several meters via a fiber optic cable. System bandwidth is 10 to 15 MHz with a gain of unity for amplitudes of + or - 0.5 V. Transmission is switched to dc if moderate drift is acceptable. The signal to noise ratio is 46 dB which can be improved if a 5 MHz filter is used with transient recorders with a 20 MHz digitizing rate. A surge arrester protects against very fast high amplitude voltage spikes.

  11. 47 CFR 90.1319 - Policies governing the use of the 3650-3700 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Wireless Broadband Services in the 3650... identifying the locations of registered stations will be available at http://wireless.fcc.gov/uls....

  12. 47 CFR 15.240 - Operation in the band 433.5-434.5 MHz.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... commercial and industrial areas such as ports, rail terminals and warehouses. Two-way operation is permitted... locations where the devices are installed to the FCC Office of Engineering and Technology, which...

  13. 76 FR 10295 - Implementing a Nationwide, Broadband, Interoperable Public Safety Network in the 700 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-24

    ... of Documents in Rulemaking Proceedings, 63 FR 24121 (1998). Electronic Filers: Comments may be filed..., namely (1) Internet access; (2) Virtual Private Network (VPN) access to any authorized site and to...

  14. 47 CFR 15.250 - Operation of wideband systems within the band 5925-7250 MHz.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... techniques that may be employed as well as the frequency stability of the transmitter over expected variations in temperature and supply voltage. (b) The −10 dB bandwidth of the fundamental emission shall...

  15. 47 CFR 15.250 - Operation of wideband systems within the band 5925-7250 MHz.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... techniques that may be employed as well as the frequency stability of the transmitter over expected variations in temperature and supply voltage. (b) The −10 dB bandwidth of the fundamental emission shall...

  16. 47 CFR 90.1209 - Policies governing the use of the 4940-4990 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing Licensing and Use... is not in the public interest. (c) Licensees will make every practical effort to protect radio astronomy operations as specified in § 2.106, footnote US311 of this chapter. (d) There is no time limit...

  17. 47 CFR 90.1209 - Policies governing the use of the 4940-4990 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing Licensing and Use... is not in the public interest. (c) Licensees will make every practical effort to protect radio astronomy operations as specified in § 2.106, footnote US311 of this chapter. (d) There is no time limit...

  18. 47 CFR 90.1209 - Policies governing the use of the 4940-4990 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing Licensing and Use... is not in the public interest. (c) Licensees will make every practical effort to protect radio astronomy operations as specified in § 2.106, footnote US311 of this chapter. (d) There is no time limit...

  19. 47 CFR 90.1209 - Policies governing the use of the 4940-4990 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing Licensing and Use... is not in the public interest. (c) Licensees will make every practical effort to protect radio astronomy operations as specified in § 2.106, footnote US311 of this chapter. (d) There is no time limit...

  20. 47 CFR 90.1209 - Policies governing the use of the 4940-4990 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing Licensing and Use... is not in the public interest. (c) Licensees will make every practical effort to protect radio astronomy operations as specified in § 2.106, footnote US311 of this chapter. (d) There is no time limit...

  1. 47 CFR 90.187 - Trunking in the bands between 150 and 512 MHz.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... both a spectral and a contour overlap as defined: (i) Spectral overlap. Licensees (and filers of... proposed centralized trunked station that must be considered. (ii) Contour overlap. (A) Licensees (and filers of previously filed pending applications) with a service contour (37 dBu for stations in the...

  2. 47 CFR 90.187 - Trunking in the bands between 150 and 512 MHz.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... both a spectral and a contour overlap as defined: (i) Spectral overlap. Licensees (and filers of... proposed centralized trunked station that must be considered. (ii) Contour overlap. (A) Licensees (and filers of previously filed pending applications) with a service contour (37 dBu for stations in the...

  3. 76 FR 51271 - Implementing a Nationwide, Broadband, Interoperable Public Safety Network in the 700 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-18

    ... deployment and evolution of the nationwide network. DATES: Effective: August 18, 2011, except Sec. 90.1407(f.... The Commission designated Long Term Evolution (LTE), in particular at least 3GPP Standard,...

  4. 77 FR 43008 - Unlicensed Personal Communications Service Devices in the 1920-1930 MHz Band

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-23

    ... new generation of unlicensed devices capable of supporting broadband connectivity using Digital... supporting broadband connectivity using Digital Enhanced Cordless Telecommunications (DECT) technology... UPCS devices, particularly those designed to transmit with wider bandwidths but that define fewer...

  5. 47 CFR 95.627 - MedRadio transmitters in the 401-406 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... the MedRadio programmer/control transmitter monitoring system antenna gain relative to an isotropic... level must be increased or decreased by an amount equal to the monitoring system antenna gain above or below the gain of an isotropic antenna, respectively. (4) If no signal in a MedRadio channel above...

  6. 47 CFR 27.1230 - Conversion of the 2500-2690 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio Service and Educational Broadband Service...), will occur in the following five phases: initiating the transition process (see § 27.1231),...

  7. 47 CFR 90.353 - LMS operations in the 902-928 MHz band.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... request: (a) LMS operations will not cause interference to and must tolerate interference from industrial... through actual field tests that their systems do not cause unacceptable levels of interference to 47 CFR... service (AVM) systems (see § 90.363) are authorized on a shared basis and must cooperate in the...

  8. 47 CFR 90.353 - LMS operations in the 902-928 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... request: (a) LMS operations will not cause interference to and must tolerate interference from industrial... through actual field tests that their systems do not cause unacceptable levels of interference to 47 CFR... service (AVM) systems (see § 90.363) are authorized on a shared basis and must cooperate in the...

  9. 47 CFR 90.353 - LMS operations in the 902-928 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... request: (a) LMS operations will not cause interference to and must tolerate interference from industrial... through actual field tests that their systems do not cause unacceptable levels of interference to 47 CFR... service (AVM) systems (see § 90.363) are authorized on a shared basis and must cooperate in the...

  10. 47 CFR 90.353 - LMS operations in the 902-928 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... request: (a) LMS operations will not cause interference to and must tolerate interference from industrial... through actual field tests that their systems do not cause unacceptable levels of interference to 47 CFR... service (AVM) systems (see § 90.363) are authorized on a shared basis and must cooperate in the...

  11. 47 CFR 90.353 - LMS operations in the 902-928 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... request: (a) LMS operations will not cause interference to and must tolerate interference from industrial... through actual field tests that their systems do not cause unacceptable levels of interference to 47 CFR... service (AVM) systems (see § 90.363) are authorized on a shared basis and must cooperate in the...

  12. Sub-MHz accuracy measurement of the S(2) 2-0 transition frequency of D2 by Comb-Assisted Cavity Ring Down spectroscopy

    NASA Astrophysics Data System (ADS)

    Mondelain, D.; Kassi, S.; Sala, T.; Romanini, D.; Gatti, D.; Campargue, A.

    2016-08-01

    The line position of the very weak S(2) transition of deuterium in the 2-0 band has been measured with a Comb-Assisted Cavity Ring Down spectrometer. The high sensitivity spectra were recorded at 5 and 10 mbar with a Noise Equivalent Absorption, αmin, of 8 × 10-11 cm-1. The line positions at 5 and 10 mbar were measured with sub-MHz accuracy (460 and 260 kHz, respectively). After correction of the line pressure-shift, the frequency at zero pressure of the S(2) transition of the first overtone band was determined to be 187 104 299.51 ± 0.50 MHz. This value agrees within 1.7 MHz with the frequency obtained from the best available ab initio calculations and corresponds to only 15% of the claimed theoretical uncertainty.

  13. NRAO 43-m telescope operation at 170-1700 MHz: a Bi-Static Radar Collaboration

    NASA Astrophysics Data System (ADS)

    Langston, Glen

    2007-08-01

    The NRAO 43m telescope has been refurbished and begun regular observations in the frequency range 170 - 1700 MHz. The 43 m operations support a Bi-Static Radar Collaboration to measure the Earth's ionospheric turbulence. Researchers from Chalmers University of Technology in Sweden have designed and built a unique design wide-band feed, 150 - 1700 MHz. Lincoln Laboratories/MIT has packaged the feed with room temperature low noise amplifiers. Lincoln Laboratories has installed a high-dynamic range RF system together with a wide-band sampler system. The NRAO operates the 43 m telescope according to schedules authored by Lincoln Laboratories. Currently the 43 m telescope is tracking spacecraft 48 hr a week. The tracking antenna operation is completely automated. A group at MIT/Haystack have installed a second radar experiment at the 43 m as well as an array of 6 ‘discone’ antennas. Their experiment is testing the use of reflected FM radio stations as probes of the ionosphere.

  14. 20-MHz B-mode ultrasound in monitoring the course of localized scleroderma (morphea).

    PubMed

    Hoffmann, K; Gerbaulet, U; el-Gammal, S; Altmeyer, P

    1991-01-01

    Ultrasonographic methods have recently provided us with the means for objective and non-invasive monitoring of the dynamics of chronic skin diseases. We examined 34 patients with localized scleroderma (morphea) using a 20-MHz B-mode ultrasound scanner (DUB 20, Taberna pro Medicum, Lüneburg). In patients with plaque-type and linear band-type localized scleroderma intraindividual comparison of sclerotic skin with corresponding areas of healthy skin showed thickening of the corium. The increase in corium thickness was between 2% and 251%. The extent of the difference in corium thickness between sclerotic and healthy skin depended on the location-originally thin skin showed a greater degree of sclerosis. We also frequently found enhanced reflexes in the lower corium and hyperechoic, widened bands of connective tissue traversing the subcutaneous fatty tissue from the corium-subcutis border in the direction of the muscle fascia. 20 patients were examined several times in the course of one year. In nine patients we found ultrasonographic evidence of regression (decrease in thickness 26%) and in nine the ultrasound examination showed progression (increase in thickness 28%). 20-MHz B-mode ultrasound imaging is a suitable non-invasive method for monitoring the course and treatment of localized scleroderma. Its routine use is strongly recommended.

  15. 47 CFR 25.254 - Special requirements for ancillary terrestrial components operating in the 1610-1626.5 MHz/2483.5...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... incorporation by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies of this standard can be... § 25.213 to protect radio astronomy service (RAS) observations in the 1610.6-1613.8 MHz band...

  16. 47 CFR 25.254 - Special requirements for ancillary terrestrial components operating in the 1610-1626.5 MHz/2483.5...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... incorporation by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies of this standard can be... § 25.213 to protect radio astronomy service (RAS) observations in the 1610.6-1613.8 MHz band...

  17. 47 CFR 25.221 - Blanket Licensing provisions for Earth Stations on Vessels (ESVs) receiving in the 3700-4200 MHz...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... the 5925-6425 MHz (Earth-to-space) frequency band, operating with Geostationary Satellite Orbit (GSO) Satellites in the Fixed-Satellite Service. 25.221 Section 25.221 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Technical Standards § 25.221...

  18. 47 CFR 25.221 - Blanket Licensing provisions for Earth Stations on Vessels (ESVs) receiving in the 3700-4200 MHz...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the 5925-6425 MHz (Earth-to-space) frequency band, operating with Geostationary Satellite Orbit (GSO) Satellites in the Fixed-Satellite Service. 25.221 Section 25.221 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Technical Standards § 25.221...

  19. 47 CFR 25.221 - Blanket Licensing provisions for Earth Stations on Vessels (ESVs) receiving in the 3700-4200 MHz...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... the 5925-6425 MHz (Earth-to-space) frequency band, operating with Geostationary Satellite Orbit (GSO) Satellites in the Fixed-Satellite Service. 25.221 Section 25.221 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Technical Standards § 25.221...

  20. 47 CFR 25.221 - Blanket Licensing provisions for Earth Stations on Vessels (ESVs) receiving in the 3700-4200 MHz...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... the 5925-6425 MHz (Earth-to-space) frequency band, operating with Geostationary Satellite Orbit (GSO) Satellites in the Fixed-Satellite Service. 25.221 Section 25.221 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Technical Standards § 25.221...

  1. Achievement of a 920-MHz High Resolution NMR

    NASA Astrophysics Data System (ADS)

    Hashi, Kenjiro; Shimizu, Tadashi; Goto, Atsushi; Kiyoshi, Tsukasa; Matsumoto, Shinji; Wada, Hitoshi; Fujito, Teruaki; Hasegawa, Ken-ichi; Yoshikawa, Masatoshi; Miki, Takashi; Ito, Satoshi; Hamada, Mamoru; Hayashi, Seiji

    2002-06-01

    We have developed a 920-MHz NMR system and performed the proton NMR measurement of H 2O and ethylbenzene using the superconducting magnet operating at 21.6 T (920 MHz for proton), which is the highest field produced by a superconducting NMR magnet in the persistent mode. From the NMR measurements, it is verified that both homogeneity and stability of the magnet have a specification sufficient for a high resolution NMR.

  2. Real-Time, Polyphase-FFT, 640-MHz Spectrum Analyzer

    NASA Technical Reports Server (NTRS)

    Zimmerman, George A.; Garyantes, Michael F.; Grimm, Michael J.; Charny, Bentsian; Brown, Randy D.; Wilck, Helmut C.

    1994-01-01

    Real-time polyphase-fast-Fourier-transform, polyphase-FFT, spectrum analyzer designed to aid in detection of multigigahertz radio signals in two 320-MHz-wide polarization channels. Spectrum analyzer divides total spectrum of 640 MHz into 33,554,432 frequency channels of about 20 Hz each. Size and cost of polyphase-coefficient memory substantially reduced and much of processing loss of windowed FFTs eliminated.

  3. Observation of band gaps in the gigahertz range and deaf bands in a hypersonic aluminum nitride phononic crystal slab

    NASA Astrophysics Data System (ADS)

    Gorisse, M.; Benchabane, S.; Teissier, G.; Billard, C.; Reinhardt, A.; Laude, V.; Defaÿ, E.; Aïd, M.

    2011-06-01

    We report on the observation of elastic waves propagating in a two-dimensional phononic crystal composed of air holes drilled in an aluminum nitride membrane. The theoretical band structure indicates the existence of an acoustic band gap centered around 800 MHz with a relative bandwidth of 6.5% that is confirmed by gigahertz optical images of the surface displacement. Further electrical measurements and computation of the transmission reveal a much wider attenuation band that is explained by the deaf character of certain bands resulting from the orthogonality of their polarization with that of the source.

  4. 47 CFR 97.301 - Authorized frequency bands.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... frequency bands are available to an amateur station located within 50 km of the Earth's surface, within the... 3 MHz Sharing requirements see § 97.303(paragraph) 6 m 50-54 50-54 (a) 2 m 144-146 144-148 144-148..., or who holds a Class 1 IARP license: Wavelength band MF ITU region 1 kHz ITU region 2 kHz ITU...

  5. Study of loss mechanisms of Mn-Zn ferrites in the frequency from 1 MHz to 10 MHz

    SciTech Connect

    Tung, M.J.; Tseng, T.Y. . Institute of Electronics); Chang, W.C. . Dept. of Physics); Liu, C.S.; Liu, T.Y.; Chen, C.J. . Materials Research Labs.)

    1993-11-01

    The core loss mechanism of low loss grade Mn-Zn ferrite in the frequency from 1MHz to 10MHz was investigated in order to find out the Possibility of developing Mn-Zn ferrites to be used at such high frequency region. under the condition of f.B = 25KHz.T, it was found that dielectric loss dominated the core loss at the frequency between 1.1 and 3MHz, while eddy current loss dominated the core loss at the frequency higher than 3MHz. It is suggested that decrease of grain boundary capacitance and increase of grain resistivity of the core may be the suitable ways for the Mn-Zn ferrites to be used at such frequency region.

  6. The 136 MHz/400 MHz earth station antenna-noise temperature prediction program documentation for RAE-B

    NASA Technical Reports Server (NTRS)

    Chin, M.

    1972-01-01

    A simulation study to determine the 136 MHz and 400 MHz noise temperature of the ground network antennas which will track the RAE-B satellite during data transmission periods is described. Since the noise temperature of the antenna effectively sets the signal-to-noise ratio (SNR) of the received signal, a knowledge of SNR will be helpful in locating the optimum time windows for data transmission during low-noise periods. Antenna-noise temperatures at 136 MHz and 400 MHz will be predicted for selected earth-based ground stations which will support RAE-B. The antenna-noise temperature predictions will include the effects of galactic-brightness temperature, the sun, and the brightest radio stars. Predictions will cover the ten-month period from March 1, 1973 to December 31, 1973. The RAE-B mission will be expecially susceptible to SNR degradation during the two eclipses of the Sun occurring in this period.

  7. Ka-Band Atmospheric Noise Temperature Measurements at Goldstone, California Using a 34-meter Beam Waveguide Antenna

    NASA Technical Reports Server (NTRS)

    Morabito, D.; Clauss, R.; Speranza, M.

    1997-01-01

    (View graphs) NASA's Deep space missions have used 960 MHz, 2.3 GHz, and 8.4 GHz for spacecraft communications dowlinks. Ka-band (32 GHz) is being considered as a downlink frequency for future flight projects.

  8. Bernauer's bands.

    PubMed

    Shtukenberg, Alexander; Gunn, Erica; Gazzano, Massimo; Freudenthal, John; Camp, Eric; Sours, Ryan; Rosseeva, Elena; Kahr, Bart

    2011-06-01

    Ferdinand Bernauer proposed in his monograph, "Gedrillte" Kristalle (1929), that a great number of simple, crystalline substances grow from solution or from the melt as polycrystalline spherulites with helically twisting radii that give rise to distinct bull's-eye patterns of concentric optical bands between crossed polarizers. The idea that many common molecular crystals can be induced to grow as mesoscale helices is a remarkable proposition poorly grounded in theories of polycrystalline pattern formation. Recent reinvestigation of one of the systems Bernauer described revealed that rhythmic precipitation in the absence of helical twisting accounted for modulated optical properties [Gunn, E. et al. J. Am. Chem. Soc. 2006, 128, 14234-14235]. Herein, the Bernauer hypothesis is re-examined in detail for three substances described in "Gedrillte" Kristalle, potassium dichromate, hippuric acid, and tetraphenyl lead, using contemporary methods of analysis not available to Bernauer, including micro-focus X-ray diffraction, electron microscopy, and Mueller matrix imaging polarimetry. Potassium dichromate is shown to fall in the class of rhythmic precipitates of undistorted crystallites, while hippuric acid spherulites are well described as helical fibrils. Tetraphenyl lead spherulites grow by twisting and rhythmic precipitation. The behavior of tetraphenyl lead is likely typical of many substances in "Gedrillte" Kristalle. Rhythmic precipitation and helical twisting often coexist, complicating optical analyses and presenting Bernauer with difficulties in the characterization and classification of the objects of his interest.

  9. Parasitic signals in the receiving band of the Sub-Harmonic Arc Detection system on JET ICRF Antennas

    SciTech Connect

    Jacquet, P.; Blackman, T.; Day, I. E.; Graham, M.; Mayoral, M.-L.; Monakhov, I.; Nightingale, M.; Sharapov, S. E.; Bobkov, V.; Laxaaback, M.

    2011-12-23

    When testing the SHAD system on JET ICRF antennas, parasitic signals in the detection band (5-20MHz) were detected. We have identified emission from grid breakdown events in the Neutral Beam injectors, and Ion Cyclotron Emission from the plasma. Spurious signals in the band 4-10 MHz are also often observed at the onset of ELM events. Such parasitic signals could complicate the design and operation of SHAD in ICRF systems for fusion devices.

  10. A C-Band satellite receiver

    NASA Astrophysics Data System (ADS)

    Lupinetti, F.; Ingels, F.

    1985-12-01

    The design concept of a 24-channel C-band receiver for satellite TV signals is presented. The system comprises a low-noise amplifier, a 3.7-4.2-GHz/450-910-MHz block down converter, the receiver proper (a modified analog UNF tuner at IF = 45 MHz and a digital channel selector), and an RF modulator providing video and audio on channels 3 or 4. The operation of the receiver is described and illustrated with block diagrams and tables of specifications. A prototype receiver has been found to give good video quality and definition with clear 20-20,000-Hz audio when used with a 4-ft dish antenna.

  11. Preliminary assessment of RFI impacts on TDRSS in the 2- to 2.3 GHz band

    NASA Technical Reports Server (NTRS)

    Lyttle, J. D.

    1974-01-01

    A study was conducted of the radio frequency bands and radio frequency interference (RFI) impacts on the TDR satellite. Quick look evaluations were performed on RFI conditions in the 136 to 138 MHz and 400.5 to 401.5 MHz bands. An approximate chronological account of the investigations and the intermediate findings are presented. The preliminary results of RFI evaluations in the nominally 2 to 2.3 GHz band. An analysis of the time interaction of user satellites with microwave radio-relay type communications beams as a source of RFI is included.

  12. 120 MW, 800 MHz Magnicon for a Future Muon Collider

    SciTech Connect

    Jay L. Hirshfield

    2005-12-15

    Development of a pulsed magnicon at 800 MHz was carried out for the muon collider application, based on experience with similar amplifiers in the frequency range between 915 MHz and 34.3 GHz. Numerical simulations using proven computer codes were employed for the conceptual design, while established design technologies were incorporated into the engineering design. A cohesive design for the 800 MHz magnicon amplifier was carried out, including design of a 200 MW diode electron gun, design of the magnet system, optimization of beam dynamics including space charge effects in the transient and steady-state regimes, design of the drive, gain, and output cavities including an rf choke in the beam exit aperture, analysis of parasitic oscillations and design means to eliminate them, and design of the beam collector capable of 20 kW average power operation.

  13. Dual passband dichroic plate for X-band

    NASA Technical Reports Server (NTRS)

    Otoshi, T. Y.; Franco, M. M.

    1988-01-01

    A need arose in the Deep Space Network for a dichroic plate that would simultaneously pass two desired frequency bands in the X-band region. In addition, the plate must be totally reflective for S-band frequencies. A dielectrically loaded dichroic plate is described that was developed to meet this need. The unique microwave properties that the new dichroic plate had to possess were: (1) insertion losses of less than 0.04 dB for X-band uplink frequencies centered at 7167 MHz and for X-band downlink frequencies centered at about 8425 MHz; (2) insertion losses that met the low loss requirements at 30 deg incidence angle simultaneously for both parallel and perpendicular polarizations; (3) total reflectivity at S-band frequencies; and (4) ability to maintain these electrical characteristics while passing 100 kW of CW power at X-band or while reflecting 100 kW of CW power at S-band. The dual passband dichroic plate is a thick metallic plate having an array of periodic round holes filled with Teflon plugs. Test results on an experimental prototype plate indicate that it is technically possible to design a dielectrically filled dichroic plate that meets all of the technical requirements.

  14. LOFAR VLBI studies at 55 MHz of 4C 43.15, a z = 2.4 radio galaxy

    NASA Astrophysics Data System (ADS)

    Morabito, Leah K.; Deller, Adam T.; Röttgering, Huub; Miley, George; Varenius, Eskil; Shimwell, Timothy W.; Moldón, Javier; Jackson, Neal; Morganti, Raffaella; van Weeren, Reinout J.; Oonk, J. B. R.

    2016-09-01

    The correlation between radio spectral index and redshift has been exploited to discover high-redshift radio galaxies, but its underlying cause is unclear. It is crucial to characterize the particle acceleration and loss mechanisms in high-redshift radio galaxies to understand why their radio spectral indices are steeper than their local counterparts. Low-frequency information on scales of ˜1 arcsec are necessary to determine the internal spectral index variation. In this paper we present the first spatially resolved studies at frequencies below 100 MHz of the z = 2.4 radio galaxy 4C 43.15 which was selected based on its ultrasteep spectral index (α < -1; Sν ˜ να) between 365 MHz and 1.4 GHz. Using the International Low Frequency Array Low Band Antenna we achieve subarcsecond imaging resolution at 55 MHz with very long baseline interferometry techniques. Our study reveals low-frequency radio emission extended along the jet axis, which connects the two lobes. The integrated spectral index for frequencies <500 MHz is -0.83. The lobes have integrated spectral indices of -1.31 ± 0.03 and -1.75 ± 0.01 for frequencies ≥1.4 GHz, implying a break frequency between 500 MHz and 1.4 GHz. These spectral properties are similar to those of local radio galaxies. We conclude that the initially measured ultrasteep spectral index is due to a combination of the steepening spectrum at high frequencies with a break at intermediate frequencies.

  15. LOFAR 150-MHz observations of the Boötes field: catalogue and source counts

    NASA Astrophysics Data System (ADS)

    Williams, W. L.; van Weeren, R. J.; Röttgering, H. J. A.; Best, P.; Dijkema, T. J.; de Gasperin, F.; Hardcastle, M. J.; Heald, G.; Prandoni, I.; Sabater, J.; Shimwell, T. W.; Tasse, C.; van Bemmel, I. M.; Brüggen, M.; Brunetti, G.; Conway, J. E.; Enßlin, T.; Engels, D.; Falcke, H.; Ferrari, C.; Haverkorn, M.; Jackson, N.; Jarvis, M. J.; Kapińska, A. D.; Mahony, E. K.; Miley, G. K.; Morabito, L. K.; Morganti, R.; Orrú, E.; Retana-Montenegro, E.; Sridhar, S. S.; Toribio, M. C.; White, G. J.; Wise, M. W.; Zwart, J. T. L.

    2016-08-01

    We present the first wide area (19 deg2), deep (≈120-150 μJy beam-1), high-resolution (5.6 × 7.4 arcsec) LOFAR High Band Antenna image of the Boötes field made at 130-169 MHz. This image is at least an order of magnitude deeper and 3-5 times higher in angular resolution than previously achieved for this field at low frequencies. The observations and data reduction, which includes full direction-dependent calibration, are described here. We present a radio source catalogue containing 6 276 sources detected over an area of 19 deg2, with a peak flux density threshold of 5σ. As the first thorough test of the facet calibration strategy, introduced by van Weeren et al., we investigate the flux and positional accuracy of the catalogue. We present differential source counts that reach an order of magnitude deeper in flux density than previously achieved at these low frequencies, and show flattening at 150-MHz flux densities below 10 mJy associated with the rise of the low flux density star-forming galaxies and radio-quiet AGN.

  16. VizieR Online Data Catalog: 180MHz Murchison Commissioning Survey (MWACS) (Hurley-Walker+, 2014)

    NASA Astrophysics Data System (ADS)

    Hurley-Walker, N.; Morgan, J.; Wayth, R. B.; Hancock, P. J.; Bell, M. E.; Bernardi, G.; Bhat, N. D. R.; Briggs, F.; Deshpande, A. A.; Ewall-Wice, A.; Feng, L.; Hazelton, B. J.; Hindson, L.; Jacobs, D. C.; Kaplan, D. L.; Kudryavtseva, N.; Lenc, E.; McKinley, B.; Mitchell, D.; Pindor, B.; Procopio, P.; Oberoi, D.; Offringa, A.; Ord, S.; Riding, J.; Bowman, J. D.; Cappallo, R.; Corey, B.; Emrich, D.; Gaensler, B. M.; Goeke, R.; Greenhill, L.; Hewitt, J.; Johnston-Hollitt, M.; Kasper, J.; Kratzenberg, E.; Lonsdale, C.; Lynch, M.; McWhirter, R.; Morales, M. F.; Morgan, E.; Prabu, T.; Rogers, A.; Roshi, A.; Shankar, U.; Srivani, K.; Subrahmanyan, R.; Tingay, S.; Waterson, M.; Webster, R.; Whitney, A.; Williams, A.; Williams, C.

    2014-10-01

    The Murchison Widefield Array Commissioning Survey (MWACS) is a ~6100deg2 104-196MHz radio sky survey performed with the Murchison Widefield Array during instrument commissioning between 2012 September and 2012 December. The data were taken as meridian drift scans with two different 32-antenna sub-arrays that were available during the commissioning period. The data were combined in the visibility plane before being imaged, and then mosaicked. The survey covers approximately 20.5hbands centred on 119, 150 and 180MHz. The survey has 3arcmin angular resolution and a typical noise level of 40mJy/beam, with reduced sensitivity near the field boundaries and bright sources. The catalogue consists of flux density and spectral index measurements for 14,110 sources, extracted from the mosaics, 1,247 of which are sub-components of complexes of sources. (2 data files).

  17. A COMBINED LOW-RADIO FREQUENCY/X-RAY STUDY OF GALAXY GROUPS. I. GIANT METREWAVE RADIO TELESCOPE OBSERVATIONS AT 235 MHz AND 610 MHz

    SciTech Connect

    Giacintucci, Simona; O'Sullivan, Ewan; Vrtilek, Jan; David, Laurence P.; Mazzotta, Pasquale; Gitti, Myriam; Jones, Christine; Forman, William R.; Raychaudhury, Somak; Ponman, Trevor; Venturi, Tiziana; Athreya, Ramana M.; Clarke, Tracy E.; Murgia, Matteo; Ishwara-Chandra, C. H.

    2011-05-10

    We present new Giant Metrewave Radio Telescope observations at 235 MHz and 610 MHz of 18 X-ray bright galaxy groups. These observations are part of an extended project, presented here and in future papers, which combines low-frequency radio and X-ray data to investigate the interaction between central active galactic nuclei (AGNs) and the intra-group medium (IGM). The radio images show a very diverse population of group-central radio sources, varying widely in size, power, morphology, and spectral index. Comparison of the radio images with Chandra and XMM-Newton X-ray images shows that groups with significant substructure in the X-ray band and marginal radio emission at {approx}>1 GHz host low-frequency radio structures that correlate with substructures in IGM. Radio-filled X-ray cavities, the most evident form of AGN/IGM interaction in our sample, are found in half of the systems and are typically associated with small, low-, or mid-power double radio sources. Two systems, NGC5044 and NGC4636, possess multiple cavities, which are isotropically distributed around the group center, possibly due to group weather. In other systems the radio/X-ray correlations are less evident. However, the AGN/IGM interaction can manifest itself through the effects of the high-pressure medium on the morphology, spectral properties, and evolution of the radio-emitting plasma. In particular, the IGM can confine fading radio lobes in old/dying radio galaxies and prevent them from dissipating quickly. Evidence for radio emission produced by former outbursts that co-exist with current activity is found in six groups of the sample.

  18. Mobile Robot Positioning with 433-MHz Wireless Motes with Varying Transmission Powers and a Particle Filter.

    PubMed

    Canedo-Rodriguez, Adrian; Rodriguez, Jose Manuel; Alvarez-Santos, Victor; Iglesias, Roberto; Regueiro, Carlos V

    2015-01-01

    In wireless positioning systems, the transmitter's power is usually fixed. In this paper, we explore the use of varying transmission powers to increase the performance of a wireless localization system. To this extent, we have designed a robot positioning system based on wireless motes. Our motes use an inexpensive, low-power sub-1-GHz system-on-chip (CC1110) working in the 433-MHz ISM band. Our localization algorithm is based on a particle filter and infers the robot position by: (1) comparing the power received with the expected one; and (2) integrating the robot displacement. We demonstrate that the use of transmitters that vary their transmission power over time improves the performance of the wireless positioning system significantly, with respect to a system that uses fixed power transmitters. This opens the door for applications where the robot can localize itself actively by requesting the transmitters to change their power in real time. PMID:25942641

  19. Mobile Robot Positioning with 433-MHz Wireless Motes with Varying Transmission Powers and a Particle Filter

    PubMed Central

    Canedo-Rodriguez, Adrian; Rodriguez, Jose Manuel; Alvarez-Santos, Victor; Iglesias, Roberto; Regueiro, Carlos V.

    2015-01-01

    In wireless positioning systems, the transmitter's power is usually fixed. In this paper, we explore the use of varying transmission powers to increase the performance of a wireless localization system. To this extent, we have designed a robot positioning system based on wireless motes. Our motes use an inexpensive, low-power sub-1-GHz system-on-chip (CC1110) working in the 433-MHz ISM band. Our localization algorithm is based on a particle filter and infers the robot position by: (1) comparing the power received with the expected one; and (2) integrating the robot displacement. We demonstrate that the use of transmitters that vary their transmission power over time improves the performance of the wireless positioning system significantly, with respect to a system that uses fixed power transmitters. This opens the door for applications where the robot can localize itself actively by requesting the transmitters to change their power in real time. PMID:25942641

  20. Progress on the high-current 704 MHz superconducting RF cavity at BNL

    SciTech Connect

    Xu W.; Astefanous, C.; Belomestnykh, S.; Ben-Zvi, I.; et al

    2012-05-20

    The 704 MHz high current superconducting cavity has been designed with consideration of both performance of fundamental mode and damping of higher order modes. A copper prototype cavity was fabricated by AES and delivered to BNL. RF measurements were carried out on this prototype cavity, including fundamental pass-band and HOM spectrum measurements, HOM studies using bead-pull setup, prototyping of antenna-type HOM couplers. The measurements show that the cavity has very good damping for the higher-order modes, which was one of the main goals for the high current cavity design. 3D cavity models were simulated with Omega3P code developed by SLAC to compare with the measurements. The paper describes the cavity design, RF measurement setups and results for the copper prototype. The progress with the niobium cavity fabrication will also be described.

  1. Intravascular photoacoustic imaging at 35 and 80 MHz

    PubMed Central

    Li, Xiang; Wei, Wei; Shung, K. Kirk

    2012-01-01

    Abstract. The catheter-based intravascular photoacoustic (IVPA) imaging for diagnosing atherosclerosis, which can provide optical absorption contrast of the arterial wall besides acoustic scattering contrast from the conventional intravascular ultrasound (IVUS) imaging, has been intensively researched recently. The resolution of IVPA is determined by the frequency bandwidth of an ultrasonic transducer. Higher resolution can be achieved by increasing the transducer’s working frequency and bandwidth. We introduce IVPA imaging at 35 and 80 MHz by using newly designed integrated IVUS/IVPA probes. This is the first time IVPA has been achieved as high as 80 MHz. Six-micrometer tungsten wires were imaged to evaluate the probes’ spatial resolutions and beam patterns. Healthy rabbit aorta was imaged in vitro. Imaging results show that IVPA has superior contrast over IVUS in identifying the arterial wall, and IVPA at 80 MHz demonstrates extraordinary resolution (35 μm) compared to 35 MHz. PMID:23224004

  2. COSPAS/SARSAT 406-MHz emergency beacon digital controller

    NASA Technical Reports Server (NTRS)

    Ivancic, William D.

    1988-01-01

    The digital control portion of a low-cost 406-MHz COSPAS/SARSAT emergency beacon has been designed and breadboarded at the NASA Lewis Research Center. This report discusses the requirements and design tradeoffs of the digital controller and describes the hardware and software design, which is available only to United States citizens and companies.

  3. Q disease on 350-MHZ superconducting spoke cavities

    SciTech Connect

    Tajima, T.; Edwards, R. L.; Krawczyk, F. L.; Liu, Jianfei; Schrage, D. L.; Shapiro, A. H.

    2003-01-01

    Q disease, i.e., an increase of RF surface resistance due to hydride precipitation, has been investigated with 350-MHz spoke cavities. This phenomenon was studied extensively in early 1990s with cavities at frequencies >1 GHz. This is possibly due to the fact that the lower-frequency cavities were believed to show insignificant effect. However, early 500-MHz KEK elliptical cavities and JAERI 130-MHz quarter wave resonators have shown significant Q degradation, suggesting that this disease can be a serious problem with lower-frequency cavities as well. Since there were no quantitative data with 350-MHz cavities, we decided to measure our two spoke cavities. Our spoke cavities were made of RRR{approx}250 niobium and were chemically polished {approx}150 microns. A few series of systematic tests have shown that our spoke cavities do not show any Q{sub 0} degradation up to {approx}24 hours of holding the cavity at 100 K. However it starts showing degradation if it is held for a longer time and the additional loss due to the Q disease increases linearly. It was also found that our spoke cavity recovers from Q disease if it is warmed up to 150 K or higher for 12 hours.

  4. Radar - 449MHz - Astoria, OR (AST) - Raw Data

    DOE Data Explorer

    Coleman, Tim

    2016-10-25

    **Winds.** A radar wind profiler measures the Doppler shift of electromagnetic energy scattered back from atmospheric turbulence and hydrometeors along 3-5 vertical and off-vertical point beam directions. Back-scattered signal strength and radial-component velocities are remotely sensed along all beam directions and are combined to derive the horizontal wind field over the radar. These data typically are sampled and averaged hourly and usually have 6-m and/or 100-m vertical resolutions up to 4 km for the 915 MHz and 8 km for the 449 MHz systems. **Temperature.** To measure atmospheric temperature, a radio acoustic sound system (RASS) is used in conjunction with the wind profile. These data typically are sampled and averaged for five minutes each hour and have a 60-m vertical resolution up to 1.5 km for the 915 MHz and 60-m up to 3.5k m for the 449 MHz. **Spectra.** The daily raw spectra data are available. The files are labeled "header" and "data." These data files are generated by LapXM, binary encoded, and are specific to this application. These datasets contain the raw data from the radar, such as signal-to-noise, signal power, radial velocity, and spectra widths.

  5. Radar - 449MHz - North Bend, OR (OTH) - Raw Data

    DOE Data Explorer

    Coleman, Tim

    2016-10-25

    **Winds.** A radar wind profiler measures the Doppler shift of electromagnetic energy scattered back from atmospheric turbulence and hydrometeors along 3-5 vertical and off-vertical point beam directions. Back-scattered signal strength and radial-component velocities are remotely sensed along all beam directions and are combined to derive the horizontal wind field over the radar. These data typically are sampled and averaged hourly and usually have 6-m and/or 100-m vertical resolutions up to 4 km for the 915 MHz and 8 km for the 449 MHz systems. **Temperature.** To measure atmospheric temperature, a radio acoustic sound system (RASS) is used in conjunction with the wind profile. These data typically are sampled and averaged for five minutes each hour and have a 60-m vertical resolution up to 1.5 km for the 915 MHz and 60-m up to 3.5k m for the 449 MHz. **Spectra.** The daily raw spectra data are available. The files are labeled "header" and "data." These data files are generated by LapXM, binary encoded, and are specific to this application. These datasets contain the raw data from the radar, such as signal-to-noise, signal power, radial velocity, and spectra widths.

  6. Radar - 449MHz - Forks, WA (FKS) - Raw Data

    DOE Data Explorer

    Coleman, Tim

    2016-10-25

    **Winds.** A radar wind profiler measures the Doppler shift of electromagnetic energy scattered back from atmospheric turbulence and hydrometeors along 3-5 vertical and off-vertical point beam directions. Back-scattered signal strength and radial-component velocities are remotely sensed along all beam directions and are combined to derive the horizontal wind field over the radar. These data typically are sampled and averaged hourly and usually have 6-m and/or 100-m vertical resolutions up to 4 km for the 915 MHz and 8 km for the 449 MHz systems. **Temperature.** To measure atmospheric temperature, a radio acoustic sound system (RASS) is used in conjunction with the wind profile. These data typically are sampled and averaged for five minutes each hour and have a 60-m vertical resolution up to 1.5 km for the 915 MHz and 60-m up to 3.5k m for the 449 MHz. **Spectra.** The daily raw spectra data are available. The files are labeled "header" and "data." These data files are generated by LapXM, binary encoded, and are specific to this application. These datasets contain the raw data from the radar, such as signal-to-noise, signal power, radial velocity, and spectra widths.

  7. Laparoscopic gastric banding - discharge

    MedlinePlus

    ... laparoscopic gastric banding - discharge; Obesity gastric banding discharge; Weight loss - gastric banding discharge ... as your body gets used to your weight loss and your weight becomes stable. Weight loss may be slower after ...

  8. 77 FR 22720 - Service Rules for Advanced Wireless Services in the 2000-2020 MHz and 2180-2200 MHz Bands, etc.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-17

    ... purchased from the Commission's duplicating contractor, Best Copy and Printing, Inc. (BCPI), Portals II, 445... print, audio cassette, and Braille) are available by contacting Brian Millin at (202) 418-7426, TTY (202... Electronic Comment Filing System (ECFS). See Electronic Filing of Documents in Rulemaking Proceedings, 63...

  9. 78 FR 8229 - Service Rules for Advanced Wireless Services in the 2000-2020 MHz and 2180-2200 MHz Bands, etc.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-05

    .... The full text of this document is available for inspection and copying during normal business hours in... Notice of Proposed Rulemaking and Notice of Inquiry (``AWS-4 NPRM'' and ``AWS-4 NOI''), 77 FR 22720, April 17, 2012, and 77 FR 22737, April 17, 2012, including shifting the AWS-4 uplink spectrum up five...

  10. 78 FR 65982 - Auction of H Block Licenses in the 1915-1920 MHz and 1995-2000 MHz Bands Rescheduled for January...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-04

    ... Comment Public Notice, 78 FR 45524, July 29, 2013. B. Description of Licenses To Be Offered in Auction 96 4. In the H Block Report and Order, 78 FR 50213, August 16, 2013, the Commission concluded that... violate 47 CFR 1.2105(c), particularly in light of the limited information procedures in effect...

  11. 78 FR 45524 - Auction of H Block Licenses in the 1915-1920 MHz and 1995-2000 MHz Bands; Comment Sought on...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-29

    ....BCPIWEB.com . When ordering documents from BCPI, please provide the appropriate FCC document number, for... evaluated relative to individual bids, hence making it easier than in more complex package bidding...

  12. High power testing of the 402.5 MHZ and 805 MHZ RF windows for the spallation neutron source accelerator

    SciTech Connect

    Cummings, K. A.; De Baca, J. M.; Harrison, J. S.; Rodriguez, M. B.; Torrez, P. A.; Warner, D. K.

    2003-01-01

    Hisorically, Radio Frequency (RF) windows have been a common point of failure in input power couplers; therefore, reliable RF windows are critical to the success of the Spallation Neutron Source (SNS) project. The normal conducting part of the SNS accelerator requires six RF windows at 402.5 MHz and eight RF windows at 805 MHz[l]. Each RF window will transmit up to 180 kW of average power and 2.5 MW peak power at 60 Hz with 1.2 millisecond pulses. The RF windows, designed and manufactured by Thales, were tested at the full average power for 4 hours to ensure no problems with the high average power and then tested to an effective forward power level of 10 MW by testing at 2.5 MW forward power into a short and varying the phase of the standing wave. The sliding short was moved from 0 to 180 degrees to ensure no arcing or breakdown problems occur in any part of the window. This paper discusses the results of the high power testing of both the 402.5 MHz and the 805 MHz RF windows. Problems encountered during testing and the solutions for these problems are discussed.

  13. 800MHz Crab Cavity Conceptual Design For the LHC Upgrade

    SciTech Connect

    Xiao, Liling; Li, Zenghai; Ng, Cho-Kuen; Seryi, Andrei; /SLAC

    2009-05-26

    In this paper, we present an 800 MHz crab cavity conceptual design for the LHC upgrade. The cell shape is optimized for lower maximum peak surface fields as well as higher transverse R/Q. A compact coax-to-coax coupler scheme is proposed to damp the LOM/SOM modes. A two-stub antenna with a notch filter is used as the HOM coupler to damp the HOM modes in the horizontal plane and rejects the operating mode at 800MHz. Multipacting (MP) simulations show that there are strong MP particles at the disks. Adding grooves along the short axis without changing the operating mode's RF characteristics can suppress the MP activities. Possible input coupler configurations are discussed.

  14. R&D of BEPCII 500 MHz superconducting cavity

    NASA Astrophysics Data System (ADS)

    Liu, YaPing; Wang, GuangWei; Pan, WeiMin; Li, JiZhen; Liu, DeGui; Sun, Yi; Li, ZhongQuan; Dai, JianPing; Li, ShaoPeng; He, Kun; Wang, GuoPing; Zhao, GuangYuan; Ma, Qiang; Lin, HaiYing; Sha, Peng; Wang, QunYao; Qiu, Feng; Meng, FanBo; Li, Han

    2011-12-01

    Beijing Electron-Positron Collider Upgrade (BEPCII) adopts two 500 MHz superconducting cavities (SCCs) in each ring for higher accelerated gradient, higher Q and lower impedance (Wang et al. The proceedings of SRF'07). There's no spare cavity due to the limited time and funding during BEPCII construction. If any serious trouble happened on either one of the two cavities and could not be recovered in a short time, the operation of BEPCII facility will be affected. Therefore, since 2009 three spare cavities have been fabricated in China to ensure reliable operation, and two of them have been successfully vertically tested in January and July 2011. This paper will briefly present the manufacture, post-process and vertical test performance of the 500 MHz spare cavities.

  15. ARM - Midlatitude Continental Convective Clouds Experiment (MC3E): Multi-Frequency Profilers, S-band Radar (williams-s_band)

    DOE Data Explorer

    Williams, Christopher

    2012-11-06

    This data was collected by the NOAA 449-MHz and 2.8-GHz profilers in support of the Department of Energy (DOE) and NASA sponsored Mid-latitude Continental Convective Cloud Experiment (MC3E). The profiling radars were deployed in Northern Oklahoma at the DOE Atmospheric Radiation Mission (ARM) Southern Great Plans (SGP) Central Facility from 22 April through 6 June 2011. NOAA deployed three instruments: a Parsivel disdrometer, a 2.8-GHz profiler, and a 449-MHz profiler. The parasivel provided surface estimates of the raindrop size distribution and is the reference used to absolutely calibrate the 2.8 GHz profiler. The 2.8-GHz profiler provided unattenuated reflectivity profiles of the precipitation. The 449-MHz profiler provided estimates of the vertical air motion during precipitation from near the surface to just below the freezing level. By using the combination of 2.8-GHz and 449-MHz profiler observations, vertical profiles of raindrop size distributions can be retrieved. The profilers are often reference by their frequency band: the 2.8-GHz profiler operates in the S-band and the 449-MHz profiler operates in the UHF band. The raw observations are available as well as calibrated spectra and moments. This document describes how the instruments were deployed, how the data was collected, and the format of the archived data.

  16. Fractal dimension of mesospheric radar backscatter at 2. 75 MHz

    SciTech Connect

    Hall, C.; Armstrong, R.J.; La Hoz, C. )

    1991-04-01

    The authors identified the fractal dimension of radar returns from the mesopause region at 2.75 MHz. The input dataset was a time series of echo amplitude at a discrete height obtained from a partial reflection radar operating at Ramfjordmoen in northern Norway. Two different algorithms both of which yield approximations to the fractal dimension have been employed and give almost identical results. The radar echo dataset in question exhibits a dimension of between 7 and 8.

  17. Come Join the Band

    ERIC Educational Resources Information Center

    Olson, Cathy Applefeld

    2011-01-01

    A growing number of students in Blue Springs, Missouri, are joining the band, drawn by a band director who emphasizes caring and inclusiveness. In the four years since Melissia Goff arrived at Blue Springs High School, the school's extensive band program has swelled. The marching band alone has gone from 100 to 185 participants. Also under Goff's…

  18. Fast Radio Transient searches with UTMOST at 843 MHz

    NASA Astrophysics Data System (ADS)

    Caleb, M.; Flynn, C.; Bailes, M.; Barr, E. D.; Bateman, T.; Bhandari, S.; Campbell-Wilson, D.; Green, A. J.; Hunstead, R. W.; Jameson, A.; Jankowski, F.; Keane, E. F.; Ravi, V.; van Straten, W.; Krishnan, V. Venkataraman

    2016-05-01

    We report the first radio interferometric search at 843 MHz for fast transients, particularly Fast Radio Bursts (FRBs). The recently recommissioned Swinburne University of Technology's digital backend for the Molonglo Observatory Synthesis Telescope array (the UTMOST) with its large collecting area (18 000 m2) and wide instantaneous field of view (7.80 deg2) is expected to be an efficient tool to detect FRBs. As an interferometer it will be capable of discerning whether the FRBs are truly a celestial population. We show that UTMOST at full design sensitivity can detect an event approximately every few days. We report on two preliminary FRB surveys at about 7 per cent and 14 per cent, respectively, of the array's final sensitivity. Several pulsars have been detected via single pulses and no FRBs were discovered with pulse widths (W), in the range 655.36 μs < W < 41.9 ms and dispersion measures (DMs) in the range 100 < DM < 2000 pc cm-3. This non-detection sets a 2σ upper limit of the sky rate of not more than 1000 events sky-1 d-1 at 843 MHz down to a flux limit of 11 Jy for 1 ms FRBs. We show that this limit is consistent with previous survey limits at 1.4 GHz and 145 MHz and set a lower limit on the mean spectral index of FRBs of α > -3.2.

  19. Design for a 1 MHz soft magnetic material hysteresisgraph (abstract)

    NASA Astrophysics Data System (ADS)

    Dennison, Eric

    1993-05-01

    Until recently, high frequency (1 MHz) testing of magnetically soft materials has been typically limited to measurement of core loss and peak or inductive ac permeability. A high frequency hysteresisgraph allows direct examination of the hysteresis loop and calculation of values for magnetic parameters such as coercivity (Hc), peak permeability (μp), remanence (Br), core loss (Pc,Pcv,Pcm), bias drive field strength (Hbias), maximum H drive (Hmax) and maximum or saturation induction (Bmax). This paper describes the methods used to construct and calibrate a commercial high frequency magnetic hysteresisgraph which is capable of recording the primary current and secondary voltage waveforms of magnetic cores driven at up to 1 MHz. A system accuracy of 2% (for B and H parameter values) and 5% (for core loss) was achieved through careful control and calibration of signal phase shifts within the circuitry. System calibration, magnetic field calculations, and use of FFT post-processing of the acquired waveforms are discussed. The ability to accurately record the hysteresis loop of a material at 1 MHz allows high frequency core materials to be characterized not only by core loss and permeability, but by their hysteresis loop shape, coercivity, and remanence, both under pure ac and dc biased ac drive conditions. Changes in material characteristics due to dc biasing, temperature variations, defects, or mechanical stresses can be readily observed and described in terms of changes to the hysteresis curve shape.

  20. S-band synthetic aperture radar on-board NISAR satellite

    NASA Astrophysics Data System (ADS)

    Misra, Tapan; Bhan, Rakesh; Putrevu, Deepak; Mehrotra, Priyanka; Chakrabarty, Soumyabrata

    2016-05-01

    provide single, dual, compact and quasi-quad polarization imaging modes. Centre frequency for S-band SAR is 3200MHz with highest bandwidth of 75MHz. S-Band SAR utilizes 24 transmit receive modules (T/R Modules) to illuminate >240kms swath during transmit event and digital beam forming (DBF) on receive to reduce data rate by combining 24 receive channels and enhance SNR of the system. This paper provides details of S-band SAR system design, configuration and realization which is a challenging task since both L-band and S-band radars need to operate at same PRF and clock reference during simultaneous imaging operation. Further to this, SweepSAR technique demands PRF dithering (changing) to avoid dead gaps in the swath due to receive echo conflicting with transmit event.

  1. Investigation on the Frequency Allocation for Radio Astronomy at the L Band

    NASA Astrophysics Data System (ADS)

    Abidin, Z. Z.; Umar, R.; Ibrahim, Z. A.; Rosli, Z.; Asanok, K.; Gasiprong, N.

    2013-09-01

    In this paper, the frequency allocation reserved for radio astronomy in the L band set by the International Telecommunication Union (ITU), which is between 1400 and 1427 MHz, is reviewed. We argue that the nearby frequencies are still very important for radio astronomers on the ground by investigating radio objects (H i sources) around 1300-1500 MHz. The L-band window is separated into a group of four windows, namely 1400-1427 MHz (window A), 1380-1400 MHz (window B), 1350-1380 MHz (window C), and 1300-1350 MHz (window D). These windows are selected according to their redshifts from a rest frequency for hydrogen spectral line at 1420.4057 MHz. Radio objects up to z ≈ 0.1 or frequency down to 1300 MHz are examined. We argue that since window B has important radio objects within the four windows, this window should also be given to radio astronomy. They are galaxies, spiral galaxies, and galaxy clusters. This underlines the significance of window B for radio astronomers on the ground. By investigating the severeness of radio frequency interference (RFI) within these windows, we have determined that window B still has significant, consistent RFI. The main RFI sources in the four windows have also been identified. We also found that the Department of Civil Aviation of Malaysia is assigned a frequency range of 1215-1427 MHz, which is transmitted within the four windows and inside the protected frequency for radio astronomy. We also investigated the RFI in the four windows on proposed sites of future radio astronomy observatories in Malaysia and Thailand and found the two best sites as Universiti Pendidikan Sultan Idris (UPSI) and Ubon Ratchathani, respectively. It has also been determined that RFI in window B increases with population density.

  2. NRAO 43m telescope Operation at 170-1700 MHz: A Bi-Static Radar Collaboration

    NASA Astrophysics Data System (ADS)

    Langston, G. I.; MIT-Lincoln Laboratories-NRAO Collaboration

    2006-06-01

    The NRAO 43m telescope has been refurbished and begun regular observations in the frequency range 170 to 1700 MHz. The 43m operations support a Bi-Static Radar Collaboration to measure the Earth's Ionospheric Turbulence. Researchers from Chalmers University of Technology in Sweden have designed and built a unique design wide-band feed. Lincoln Laboratories/MIT has packaged the feed with room temperature low noise amplifiers. Lincoln Laboratories has installed a high-dynamic range RF system together with a wide-band sampler system. The NRAO operates the 43m telescope according to schedules authored by Lincoln Laboratories. Currently the 43m telescope is tracking spacecraft Tuesday through Friday from 10:00 AM to 3:00 PM. An operator is present at the 43m to assure proper operations. In early 2006, we will complete an upgrade to the remote monitoring of the 43m hydraulics systems. At that time we will begin un-attended operations 24 hours a day. A group at MIT/Haystack have installed a second radar experiment at the 43m as well as an array of 6 "discone" antennas. Their experiment is testing the use of reflected FM radio stations as probes of the Ionosphere. We report on the performance of the 43m system.

  3. A 2-to-48-MHz Phase-Locked Loop

    NASA Technical Reports Server (NTRS)

    Koudelka, Robert D.

    2004-01-01

    A 2-to-48-MHz phase-locked loop (PLL), developed for the U.S. space program, meets or exceeds all space shuttle clock electrical interface requirements by taking as its reference a 2-to-48-MHz clock signal and outputting a phaselocked clock signal set at the same frequency as the reference clock with transistor- transistor logic (TTL) voltage levels. Because it is more adaptable than other PLLs, the new PLL can be used in industries that employ signaling devices and as a tool in future space missions. A conventional PLL consists of a phase/frequency detector, loop filter, and voltage-controlled oscillator in which each component exists individually and is integrated into a single device. PLL components phase-lock to a single frequency or to a narrow bandwidth of frequencies. It is this design, however, that prohibits them from maintaining phase lock to a dynamically changing reference clock when a large bandwidth is required a deficiency the new PLL overcomes. Since most PLL components require their voltage-controlled oscillators to operate at greater than 2-MHz frequencies, conventional PLLs often cannot achieve the low-frequency phase lock allowed by the new PLL. The 2-to-48-MHz PLL is built on a wire-wrap board with pins wired to three position jumpers; this makes changing configurations easy. It responds to variations in voltage-controlled oscillator (VCO) ranges, duty cycle, signal-to-noise ratio (SNR), amplitude, and jitter, exceeding design specifications. A consensus state machine, implemented in a VCO range detector which assures the PLL continues to operate in the correct range, is the primary control state machine for the 2-to-48-MHz PLL circuit. By using seven overlapping frequency ranges with hysteresis, the PLL output sets the resulting phase-locked clock signal at a frequency that agrees with the reference clock with TTL voltage levels. As a space-shuttle tool, the new PLL circuit takes the noisy, degraded reference clock signals as input and outputs

  4. Effects of gas pressure on 60/13.56 MHz dual-frequency capacitively coupled plasmas

    SciTech Connect

    Yuan, Q. H.; Yin, G. Q.; Xin, Y.; Ning, Z. Y.

    2011-05-15

    The electron energy probability functions (EEPFs) were measured with increasing gas pressure in 60/13.56 MHz dual-frequency capacitively coupled plasma (DF-CCP) using compensated Langmiur electrostatic probe. The transition pressure of heating mode from collisionless to collisional heating in 60/13.56 MHz DF-CCP is found to be significantly lower than that in 13.56 MHz single-frequency CCP. As the pressure increases, the EEPFs change from bi-Maxwellian to Druyvesteyn type which is similar with that in 60 MHz single-frequency CCP. The pressure dependence of electron densities, effective electron temperatures, floating potentials, and plasma potentials in 60/13.56 MHz DF-CCP were measured and were compared with that in 60 MHz single-frequency CCP. The pressure dependence of these plasma parameters in 60/13.56 MHz DF-CCP is similar with that in 60 MHz single-frequency CCP.

  5. DSN 63 64-meter antenna S- and X-band efficiency and system noise temperature calibrations, July 1986

    NASA Technical Reports Server (NTRS)

    Slobin, S. D.

    1987-01-01

    The Deep Space Network (DSN) 64-meter antenna in Spain (DSN 63) has been calibrated prior to its upgrading to a 70-meter high efficiency configuration in preparation for the Voyager Neptune encounter in August 1989. The S-band (2285 MHz) and X-band (8420 MHz) effective area efficiency and system noise temperature calibrations were carried out during July 1986 to establish a baseline system performance for this station. It is expected that the 70-meter will result in at least a 1.9 dB G/T improvement at X-band relative to the 64-meter baseline reference.

  6. Measuring personal exposure from 900MHz mobile phone base stations in Australia and Belgium using a novel personal distributed exposimeter.

    PubMed

    Bhatt, Chhavi Raj; Thielens, Arno; Redmayne, Mary; Abramson, Michael J; Billah, Baki; Sim, Malcolm R; Vermeulen, Roel; Martens, Luc; Joseph, Wout; Benke, Geza

    2016-01-01

    The aims of this study were to: i) measure personal exposure in the Global System for Mobile communications (GSM) 900MHz downlink (DL) frequency band with two systems of exposimeters, a personal distributed exposimeter (PDE) and a pair of ExpoM-RFs, ii) compare the GSM 900MHz DL exposures across various microenvironments in Australia and Belgium, and iii) evaluate the correlation between the PDE and ExpoM-RFs measurements. Personal exposure data were collected using the PDE and two ExpoM-RFs simultaneously across 34 microenvironments (17 each in Australia and Belgium) located in urban, suburban and rural areas. Summary statistics of the electric field strengths (V/m) were computed and compared across similar microenvironments in Australia and Belgium. The personal exposures across urban microenvironments were higher than those in the rural or suburban microenvironments. Likewise, the exposure levels across the outdoor were higher than those for indoor microenvironments. The five highest median exposure levels were: city centre (0.248V/m), bus (0.124V/m), railway station (0.105V/m), mountain/forest (rural) (0.057V/m), and train (0.055V/m) [Australia]; and bicycle (urban) (0.238V/m), tram station (0.238V/m), city centre (0.156V/m), residential outdoor (urban) (0.139V/m) and park (0.124V/m) [Belgium]. Exposures in the GSM900 MHz frequency band across most of the microenvironments in Australia were significantly lower than the exposures across the microenvironments in Belgium. Overall correlations between the PDE and the ExpoM-RFs measurements were high. The measured exposure levels were far below the general public reference levels recommended in the guidelines of the ICNIRP and the ARPANSA.

  7. 47 CFR 87.199 - Special requirements for 406.0-406.1 MHz ELTs.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... is incorporated by reference in accordance with 5 U.S.C. 552(a), and 1 CFR part 51. Copies of the...-406.1 MHz ELT must contain as an integral part a homing beacon operating only on 121.500 MHz that... (a) of this section. The 121.500 MHz homing beacon must have a continuous duty cycle that may...

  8. 47 CFR 80.148 - Watch on 156.8 MHz (Channel 16).

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Watch on 156.8 MHz (Channel 16). 80.148 Section... Watches § 80.148 Watch on 156.8 MHz (Channel 16). Each compulsory vessel, while underway, must maintain a watch for radiotelephone distress calls on 156.800 MHz whenever such station is not being used...

  9. 47 CFR 80.148 - Watch on 156.8 MHz (Channel 16).

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Watch on 156.8 MHz (Channel 16). 80.148 Section... Watches § 80.148 Watch on 156.8 MHz (Channel 16). Each compulsory vessel, while underway, must maintain a watch for radiotelephone distress calls on 156.800 MHz whenever such station is not being used...

  10. 47 CFR 80.148 - Watch on 156.8 MHz (Channel 16).

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Watch on 156.8 MHz (Channel 16). 80.148 Section... Watches § 80.148 Watch on 156.8 MHz (Channel 16). Each compulsory vessel, while underway, must maintain a watch for radiotelephone distress calls on 156.800 MHz whenever such station is not being used...

  11. 47 CFR 80.148 - Watch on 156.8 MHz (Channel 16).

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Watch on 156.8 MHz (Channel 16). 80.148 Section... Watches § 80.148 Watch on 156.8 MHz (Channel 16). Each compulsory vessel, while underway, must maintain a watch for radiotelephone distress calls on 156.800 MHz whenever such station is not being used...

  12. 47 CFR 80.148 - Watch on 156.8 MHz (Channel 16).

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Watch on 156.8 MHz (Channel 16). 80.148 Section... Watches § 80.148 Watch on 156.8 MHz (Channel 16). Each compulsory vessel, while underway, must maintain a watch for radiotelephone distress calls on 156.800 MHz whenever such station is not being used...

  13. The 40 MHz trigger-less DAQ for the LHCb Upgrade

    NASA Astrophysics Data System (ADS)

    Campora Perez, D. H.; Falabella, A.; Galli, D.; Giacomini, F.; Gligorov, V.; Manzali, M.; Marconi, U.; Neufeld, N.; Otto, A.; Pisani, F.; Vagnoni, V. M.

    2016-07-01

    The LHCb experiment will undergo a major upgrade during the second long shutdown (2018-2019), aiming to let LHCb collect an order of magnitude more data with respect to Run 1 and Run 2. The maximum readout rate of 1 MHz is the main limitation of the present LHCb trigger. The upgraded detector, apart from major detector upgrades, foresees a full read-out, running at the LHC bunch crossing frequency of 40 MHz, using an entirely software based trigger. A new high-throughput PCIe Generation 3 based read-out board, named PCIe40, has been designed for this purpose. The read-out board will allow an efficient and cost-effective implementation of the DAQ system by means of high-speed PC networks. The network-based DAQ system reads data fragments, performs the event building, and transports events to the High-Level Trigger at an estimated aggregate rate of about 32 Tbit/s. Different architecture for the DAQ can be implemented, such as push, pull and traffic shaping with barrel-shifter. Possible technology candidates for the foreseen event-builder under study are InfiniBand and Gigabit Ethernet. In order to define the best implementation of the event-builder we are performing tests of the event-builder on different platforms with different technologies. For testing we are using an event-builder evaluator, which consists of a flexible software implementation, to be used on small size test beds as well as on HPC scale facilities. The architecture of DAQ system and up to date performance results will be presented.

  14. The Ultrasound effects on non tumoral cell line at 1 MHz therapeutic frequency

    NASA Astrophysics Data System (ADS)

    Di Giambattista, L.; Grimaldi, P.; Udroiu, I.; Pozzi, D.; Cinque, G.; Frogley, M. D.; Cassarà, A. M.; Bedini, A.; Giliberti, C.; Palomba, R.; Buogo, S.; Giansanti, A.; Congiu Castellano, A.

    2011-02-01

    The aim of this research is to investigate some bioeffects due to Therapeutic Ultrasound (1 MHz and 50MHz source transducer, was performed and the acoustics pressure was measured by a calibrated 0.5 mm needle hydrophone; moreover, the pressure field generated by the source transducer was simulated. The US effects on cells were assessed by Fourier transform infrared (FTIR) Imaging with focal plane array (FPA) detector. By the IR analysis, the US exposure on non tumoral cells has induced a change of the intensity for CH2 asymmetric stretching (2924 cm-1) band in the lipid region (3000-2800 cm-1) that it could detect an energy-dependent process. It has already shown that cells invest energy to catalyze lipid movement in order to maintain a specific transmembrane phospholipid distribution. Although asymmetry is the rule for control cells, the loss of asymmetry could be associated with the permeability change of plasma membrane inducing temporary pores.

  15. A 1400-MHz survey of 1478 Abell clusters of galaxies

    NASA Technical Reports Server (NTRS)

    Owen, F. N.; White, R. A.; Hilldrup, K. C.; Hanisch, R. J.

    1982-01-01

    Observations of 1478 Abell clusters of galaxies with the NRAO 91-m telescope at 1400 MHz are reported. The measured beam shape was deconvolved from the measured source Gaussian fits in order to estimate the source size and position angle. All detected sources within 0.5 corrected Abell cluster radii are listed, including the cluster number, richness class, distance class, magnitude of the tenth brightest galaxy, redshift estimate, corrected cluster radius in arcmin, right ascension and error, declination and error, total flux density and error, and angular structure for each source.

  16. Power sources for search and rescue 406 MHz beacons

    NASA Technical Reports Server (NTRS)

    Attia, Alan I.; Perrone, David E.

    1987-01-01

    The results of a study directed at the selection of a commercially available, safe, low cost, light weight and long storage life battery for search and rescue (Sarsat) 406 MHz emergency beacons are presented. In the course of this work, five electrochemical systems (lithium-manganese dioxide, lithium-carbon monofluoride, lithium-silver vanadium oxide, alkaline cells, and cadmium-mercuric oxide) were selected for limited experimental studies to determine their suitability for this application. Two safe, commercially available batteries (lithium-manganese dioxide and lithium-carbon monofluoride) which meet the near term requirements and several alternatives for the long term were identified.

  17. Design Methodology and Consideratios for NOVA 53 MHZ RF Cavities

    SciTech Connect

    Ader, C.; Wildman, D.W.; /Fermilab

    2010-05-19

    The NO?A Experiment will construct a detector optimized for electron neutrino detection in the existing Neutrino at Main Injector (NuMI) beamline. This beamline is capable of operating at 400 kW of primary beam power and the upgrade will allow up to 700 kW. The cavities will operate at 53 MHz and three of them will be installed in the Recycler beamline. Thermal stability of the cavities is crucial since this affects the tuning. Results of finite element thermal and structural analysis involving the copper RF cavity will be presented.

  18. Stabilised electromagnetic levitation at 2-13 MHz

    NASA Technical Reports Server (NTRS)

    Danley, T. J.; Schiffman, R. A.; Weber, J. K. R.; Krishnan, S.; Rey, C. A.; Bruno, P. A.; Nordine, P. C.

    1991-01-01

    SEL, the Stabilised Electromagnetic Levitator, has been developed to exploit the unique design opportunities available in containerless microgravity experiments. Efficiency and versatility are obtained with multiple coils driven by individual broadband amplifiers whose phase and frequency are controlled. The heating and positioning fields are decoupled. Specimen translation, spin, and for liquids, shape may be adjusted. An open coil structure provides access for optical and diagnostic probes. Results of experiments with a prototype device are discussed. Levitating and heating materials on earth were demonstrated at frequencies up to 13 MHz.

  19. Heliospheric Tomography from IPS Data at 140 MHz

    NASA Astrophysics Data System (ADS)

    Mejia-Ambriz, J. C.; Jackson, B. V.; Gonzalez-Esparza, A.; Buffington, A.

    2014-12-01

    Interplanetary scintillation (IPS) from radio telescopes provides data to study density and velocity evolution of the solar wind and heliospheric disturbances. A tomography program developed at the University of California, San Diego, makes 3D reconstructions and forecasts of the inner heliosphere dynamics from IPS results. For the first time we incorporate 140 MHz IPS results from the MEXican Array Radio Telescope (MEXART) into the tomography program. We show that MEXART data complement observations from other radio-systems located at different longitudes, thus providing more complete heliospheric coverage.

  20. Fabrication and Measurements of 500 MHz Double Spoke Cavity

    SciTech Connect

    Park, HyeKyoung; Hopper, Christopher S.; Delayen, Jean R.

    2014-12-01

    A 500 MHz β0=1 double spoke cavity has been designed and optimized for a high velocity application such as a compact electron accelerator at the Center for Accelerator Science at Old Dominion University [1] and the fabrication was recently completed at Jefferson Lab. The geometry specific to the double spoke cavity required a variety of tooling and fixtures. Also a number of asymmetric weld joints were expected to make it difficult to maintain minimal geometric deviation from the design. This paper will report the fabrication procedure, resulting tolerance from the design, initial test results and the lessons learned from the first β0=1 double spoke cavity fabrication.