47 C.F.R. § 87.131

Current through October 31, 2024
Section 87.131 - Power and emissions

The following table lists authorized emissions and maximum power. Power must be determined by direct measurement.

Class of station Frequency band/frequency Authorized emission(s)9 Maximum power1
Aeronautical advisoryVHFA3E10 watts.10
Aeronautical multicomVHFA3E10 watts.
Aeronautical enroute and aeronautical fixedHFR3E, H3E, J3E, J7B, H2B, J2D6 kw.
HFA1A, F1B, J2A, J2B1.5 kw.
VHFA3E, A9W G1D, A2D
Aeronautical search and rescueVHF
HF
A3E
R3E, H3E, J3E
10 watts.
100 watts.
Operational fixedVHFG3E, F2D30 watts.
Flight test landVHFA3E200 watts.
UHFF2D, F9D, F7D25 watts.3
HFH2B, J3E, J7D, J9W6.0 kw.
Aviation supportVHFA3E50 watts.
Airport control towerVHFA3E, G1D, G7D50 watts.
Below 400 kHzA3E15 watts.
Aeronautical utility mobileVHFA3E10 watts.
1090 MHzM1D20 watts.
Aircraft data link land test131.450 MHz, 131.550 MHz, 131.725 MHz, 131.825 MHz, 136.850 MHzA2D100 microwatts.
136.900 MHz, 136.925 MHz, 136.950 MHz, 136.975 MHzG1D100 microwatts.
Radionavigation land test108.150 MHzA9W1 milliwatt.
334.550 MHzA1N1 milliwatt.
Other VHFM1A, XXA, A1A, A1N, A2A, A2D, A9W1 watt.
Other UHFM1A, XXA, A1A, A1N, A2A, A2D, A9W1 watt.
5031.0 MHzF7D1 watt.
Radionavigation landVarious4Various4Various.4
Aeronautical Frequencies
Aircraft (Communication)UHFF2D, F9D, F7D25 watts.
VHFA3E, A9W, G1D, G7D, A2D55 watts.
HFR3E, H3E, J3E, J7B, H2B, J7D, J9W400 watts.
HFA1A, F1B, J2A, J2B100 watts.
Marine Frequencies5
156.300 MHzG3E5 watts.
156.375 MHzG3E5 watts.
156.400 MHzG3E5 watts.
156.425 MHzG3E5 watts.
156.450 MHzG3E5 watts.
156.625 MHzG3E5 watts.
156.800 MHzG3E5 watts.
156.900 MHzG3E5 watts.
157.425 MHzG3E5 watts.
HF6R3E, H3E, J3E, J2B, F1B, A3E1000 watts.
250 watts.
MF6R3E, H3E, J3E, J2B, F1B1000 watts.
HF6A3E250 watts.
(Radionavigation)Various7Various7Various.7
Aircraft earthUHFG1D, G1E, G1W60 watts.8
Differential GPSVHFG7DVarious.2

1 The power is measured at the transmitter output terminals and the type of power is determined according to the emission designator as follows:

(i) Mean power (pY) for amplitude modulated emissions and transmitting both sidebands using unmodulated full carrier.
(ii) Peak envelope power (pX) for all emission designators other than those referred to in paragraph (i) of this note.

2 Power and antenna height are restricted to the minimum necessary to achieve the required service.

3 Transmitter power may be increased to overcome line and duplexer losses but must not exceed 25 watts delivered to the antenna.

4 Frequency, emission, and maximum power will be determined after coordination with appropriate Government agencies.

5 To be used with airborne marine equipment certificated for part 80 (ship) and used in accordance with part 87.

6 Applicable onIy to marine frequencies used for public correspondence.

7 Frequency, emission, and maximum power will be determined by appropriate standards during the certification process.

8 Power may not exceed 60 watts per carrier, as measured at the input of the antenna subsystem, including any installed diplexer. The maximum EIRP may not exceed 2000 watts per carrier.

9 Excludes automatic link establishment.

10 Power is limited to 0.5 watt, but may not exceed 2 watts when station is used in an automatic unattended mode.

47 C.F.R. §87.131

54 FR 11720, Mar. 22, 1989, as amended at 57 FR 45749, Oct. 5, 1992; 62 FR 40308, July 28, 1997; 63 FR 36607, July 7, 1998; 64 FR 27474, May 20, 1999; 66 FR 26798 , May 15, 2001; 69 FR 32880 , June 14, 2004; 78 FR 61205 , Oct. 3, 2013