47 CFR 78.101 - Power limitations.
(a) On any authorized frequency, the average power delivered to an antenna shall be the minimum amount of power necessary to carry out the communications desired. In no event shall the average transmitter power or equivalent isotropically radiated power (EIRP) exceed the values specified below.
|Maximum allowable transmitter power - mobile (W)||Maximum allowable EIRP 1 2|
|Fixed (dBW)||Mobile (dBW)|
|2,025 to 2,110||20.0||+ 35|
|6,425 to 6,525||20.0||+ 35|
|6,875 to 7,125||20.0||+ 35|
|12,700 to 13,250||1.5||+ 55||+ 45|
|17,700 to 18,600||+ 55|
|18,600 to 18,800 1||+ 35|
|18,800 to 19,700||+ 55|
1 The power delivered to the antenna is limited to −3 dBW.
2 Stations licensed based on an application filed before April 16, 2003, for EIRP values exceeding those specified above, may continue to operate indefinitely in accordance with the terms of their current authorizations, subject to periodic renewal.
(b) LDS stations shall use for the visual signal-vestigial sideband AM transmission. When vestigial sideband AM transmission is used the peak power of the visual signal on all channels shall be maintained within 2 dB of equality. The mean power of the aural signal on each channel shall not exceed a level of 7 dB below the peak power of the visual signal.
(c) The EIRP of transmitters that use Automatic Transmitter Power Control (ATPC) shall not exceed the EIRP specified on the station authorization. The EIRP of non-ATPC transmitters shall be maintained as near as practicable to the EIRP specified on the station authorization.