Source: https://www.law.cornell.edu/cfr/text/47/73.756
Timestamp: 2015-10-10 10:27:11
Document Index: 765034748

Matched Legal Cases: ['§ 73', '§ 154', '§ 303', '§ 334', '§ 336', '§ 339']

47 CFR 73.756 - System specifications for double-sideband (DBS) modulated emissions in the HF broadcasting service. | US Law | LII / Legal Information Institute
§ 73.756 System specifications for double-sideband (DBS) modulated emissions in the HF broadcasting service.
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.
Emission characteristics - (1)
Nominal carrier frequencies. Nominal carrier frequencies shall be integral multiples of 5 kHz.
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.
Modulation processing. If audio-frequency signal processing is used, the dynamic range of the modulating signal shall be not less than 20 dB.
Necessary bandwidth. The necessary bandwidth shall not exceed 9 kHz.
[70 FR 46677, Aug. 10, 2005] This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.United States CodeU.S. Code: Title 47 - TELECOMMUNICATIONS§ 154 - Federal Communications Commission§ 303 - Powers and duties of Commission§ 334 - Limitation on revision of equal employment opportunity regulations§ 336 - Broadcast spectrum flexibility§ 339 - Carriage of distant television stations by satellite carriers