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Code of Federal Regulations Title 47. Telecommunication § 47.87.131 Power and emissions

Current as of October 02, 2022 | Updated by FindLaw Staff

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 advisory

VHF

A3E

10 watts.10

Aeronautical multicom

VHF

A3E

10 watts.

Aeronautical enroute and aeronautical fixed

HF

R3E, H3E, J3E, J7B, H2B, J2D

6 kw.

HF

A1A, F1B, J2A, J2B

1.5 kw.

VHF

A3E, A9W G1D, A2D

Aeronautical search and rescue

VHF

A3E

10 watts.

HF

R3E, H3E, J3E

100 watts.

Operational fixed

VHF

G3E, F2D

30 watts.

Flight test land

VHF

A3E

200 watts.

UHF

F2D, F9D, F7D

25 watts.3

HF

H2B, J3E, J7D, J9W

6.0 kw.

Aviation support

VHF

A3E

50 watts.

Airport control tower

VHF

A3E, G1D, G7D

50 watts.

Below 400 kHz

A3E

15 watts.

Aeronautical utility mobile

VHF

A3E

10 watts.

1090 MHz

M1D

20 watts.

Aircraft data link land test

131.450 MHz, 131.550 MHz, 131.725 MHz, 131.825 MHz, 136.850 MHz

A2D

100 microwatts.

136.900 MHz, 136.925 MHz, 136.950 MHz, 136.975 MHz

G1D

100 microwatts.

Radionavigation land test

108.150 MHz

A9W

1 milliwatt.

334.550 MHz

A1N

1 milliwatt.

Other VHF

M1A, XXA, A1A, A1N, A2A, A2D, A9W.

1 watt.

Other UHF

M1A, XXA, A1A, A1N, A2A, A2D, A9W.

1 watt.

5031.0 MHz

F7D

1 watt.

Radionavigation land

Various4

Various4

Various.4

Aeronautical Frequencies

Aircraft (Communication)

UHF

F2D, F9D, F7D

25 watts.

VHF

A3E, A9W, G1D, G7D, A2D

55 watts.

HF

R3E, H3E, J3E, J7B, H2B, J7D, J9W

400 watts.

HF

A1A, F1B, J2A, J2B

100 watts.

Marine Frequencies5

156.300 MHz

G3E

5 watts.

156.375 MHz

G3E

5 watts.

156.400 MHz

G3E

5 watts.

156.425 MHz

G3E

5 watts.

156.450 MHz

G3E

5 watts.

156.625 MHz

G3E

5 watts.

156.800 MHz

G3E

5 watts.

156.900 MHz

G3E

5 watts.

157.425 MHz

G3E

5 watts.

HF6

R3E, H3E, J3E, J2B, F1B, A3E.

1000 watts.

250 watts.

MF6

R3E, H3E, J3E, J2B, F1B

1000 watts.

HF6

A3E

250 watts.

(Radionavigation)

Various7

Various7

Various.7

Aircraft Earth

UHF

G1D, G1E, G1W

60 watts.8

Differential GPS

VHF

G7D

Various.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 only 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.

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Cite this article: FindLaw.com - Code of Federal Regulations Title 47. Telecommunication § 47.87.131 Power and emissions - last updated October 02, 2022 | https://codes.findlaw.com/cfr/title-47-telecommunication/cfr-sect-47-87-131/

Read this complete Code of Federal Regulations Title 47. Telecommunication § 47.87.131 Power and emissions on Westlaw

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