47 CFR 78.101 - Power limitations.

prev | next
§ 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.

Frequency band
(MHz)
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.

[ 45 FR 78694, Nov. 26, 1980, as amended at 52 FR 7144, Mar. 9, 1987; 65 FR 48182, Aug. 7, 2000; 68 FR 12776, Mar. 17, 2003]

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 Code

Title 47 published on 09-May-2017 04:29

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 47 CFR Part 78 after this date.

  • 2015-09-08; vol. 80 # 173 - Tuesday, September 8, 2015
    1. 80 FR 53747 - Reorganization of the Enforcement Bureau's Field Operations
      GPO FDSys XML | Text
      FEDERAL COMMUNICATIONS COMMISSION
      Final rule.
      Effective September 8, 2015.
      47 CFR Parts 0, 2, 11, 15, 18, 73, 74, 76, 78, 80, 90, 95, and 97