The mean power of any emission shall be attenuated below the mean output power of the transmitter in accordance with the following schedule:
A = 11 + 0.4 (P - 50) + 10 log10 B
where:
A = Attenuation (in dB) below the mean output power level.
P = Percent removed from the carrier frequency.
B = Authorized bandwidth in MHz.
[Attenuation greater than 56 decibels is not required.]
For vestigial sideband AM video: On any frequency removed from the center frequency of the authorized band by more than 50%: at least 50 dB below peak power of the emission.
Frequency band (MHz) | Maximum authorized band-width (MHz) |
1,990 to 2,110 | 17 or 18.1 |
6,425 to 6,525 | 8 or 25. |
6,875 to 7,125 | 25. |
12,700 to 13,250 | 25. |
17,700 to 19,700 | 80. |
1 After a licensee has been relocated in accordance with § 78.40 , the maximum authorized bandwidth in the frequency band 2025 to 2010 MHz will be 12 megahertz.
47 C.F.R. §78.103