47 CFR 73.756 - System specifications for double-sideband (DBS) modulated emissions in the HF broadcasting service.

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§ 73.756 System specifications for double-sideband (DBS) modulated emissions in the HF broadcasting service.
(a) Channel spacing. The nominal spacing for DSB shall be 10 kHz. However, the interleaved channels with a separation of 5 kHz may be used in accordance with the relative protection criteria, provided that the interleaved emission is not to the same geographical area as either of the emissions between which it is interleaved.
(b) Emission characteristics—
(1) Nominal carrier frequencies. Nominal carrier frequencies shall be integral multiples of 5 kHz.
(2) Audio-frequency band. The upper limit of the audio-frequency band (at—3 dB) of the transmitter shall not exceed 4.5 kHz and the lower limit shall be 150 Hz, with lower frequencies attenuated at a slope of 6 dB per octave.
(3) Modulation processing. If audio-frequency signal processing is used, the dynamic range of the modulating signal shall be not less than 20 dB.
(4) Necessary bandwidth. The necessary bandwidth shall not exceed 9 kHz.
[70 FR 46677, Aug. 10, 2005]

Title 47 published on 2014-10-01.

The following are only the Rules published in the Federal Register after the published date of Title 47.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2015-05-29; vol. 80 # 103 - Friday, May 29, 2015
    1. 80 FR 30630 - Television Broadcasting Services; Providence, Rhode Island
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      Final rule.
      This rule is effective May 29, 2015.
      47 CFR Part 73

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United States Code

Title 47 published on 2014-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 47 CFR Part 73 after this date.

  • 2015-07-14; vol. 80 # 134 - Tuesday, July 14, 2015
    1. 80 FR 40957 - Expanding the Economic and Innovation Opportunities of Spectrum Through Incentive Auctions; Channel Sharing by Full Power and Class A Stations Outside the Broadcast Television Spectrum Incentive Auction Context
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      Proposed rule.
      Comments may be filed on or before August 13, 2015, and reply comments may be filed August 28, 2015. Written comments on the proposed information collection requirements, subject to the Paperwork Reduction Act (PRA) of 1995, Public Law 104-13, should be submitted on or before September 14, 2015.
      47 CFR Part 73