§ 95.639   Maximum transmitter power.

   (a) No GMRS transmitter, under any condition of modulation, shall
   exceed:

   (1) 50 W Carrier power (average TP during one unmodulated RF cycle)
   when transmitting emission type A1D, F1D, G1D, A3E, F3E or G3E.

   (2) 50 W peak envelope TP when transmitting emission type H1D, J1D,
   R1D, H3E, J3E or R3E.

   (b) No R/C transmitter, under any condition of modulation, shall exceed
   a carrier power or peak envelope TP (single-sideband only) of:

   (1) 4 W in the 26-27 MHz frequency band, except on channel frequency
   27.255 MHz;

   (2) 25 W on channel frequency 27.255 MHz;

   (3) 0.75 W in the 72-76 MHz frequency band.

   (c) No CB transmitter, under any condition of modulation, shall exceed:

   (1) 4 W Carrier power when transmitting emission type A1D or A3E;

   (2) 12 W peak envelope TP when transmitting emission type H1D, J1D,
   R1D, H3E, J3E or R3E. Each CB transmitter which transmits emission type
   H3E, J3E or R3E must automatically prevent the TP from exceeding 12 W
   peak envelope TP or the manufacturer's rated peak envelope TP,
   whichever is less.

   (d) No FRS unit, under any condition of modulation, shall exceed 0.500
   W effective radiated power (ERP).

   (e) The maximum transmitter output power authorized for LPRS stations
   is 100 mW.

   (f) In the MedRadio Service:

   (1) For transmitters operating in the 401-406 MHz band that are not
   excepted under § 95.627(b) from the frequency monitoring requirements of
   § 95.627(a), the maximum radiated power in any 300 kHz bandwidth by
   MedRadio transmitters operating at 402-405 MHz, or in any 100 kHz
   bandwidth by MedRadio transmitters operating at 401-402 MHz or 405-406
   MHz shall not exceed 25 microwatts EIRP. For transmitters that are
   excepted under § 95.627(b) from the frequency monitoring requirements of
   § 95.627(a), the power radiated by any station operating in 402-405 MHz
   shall not exceed 100 nanowatts EIRP confined to a maximum total
   emission bandwidth of 300 kHz centered at 403.65 MHz, the power
   radiated by any station operating in 401-401.85 MHz or 405-406 MHz
   shall not exceed 250 nanowatts EIRP in any 100 kHz bandwidth and the
   power radiated by any station operating in 401.85-402 MHz shall not
   exceed 25 microwatts in the 150 kHz bandwidth. See § § 95.633(e).

   (2) For transmitters operating in 413-419 MHz, 426-432 MHz, 438-444
   MHz, or 451-457 MHz bands, the peak EIRP over the frequency bands of
   operation shall not exceed the lesser of 1 mW or 10 log B—7.782 dBm,
   where B is the 20 dB emission bandwidth in MHz; and the peak power
   spectral density shall not exceed 800 microwatts per megahertz in any 1
   megahertz band.

   (3) For transmitters operating in the 2360-2390 MHz band, the maximum
   EIRP over the frequency bands of operation shall not exceed the lesser
   of 1 mW or 10*log (B) dBm, where B is the 20 dB emission bandwidth in
   MHz.

   (4) For transmitters operating in the 2390-2400 MHz band, the maximum
   EIRP over the frequency bands of operation shall not exceed the lesser
   of 20 mW or 16 + 10*log (B) dBm, where B is the 20 dB emission
   bandwidth in MHz.

   (5) The antenna associated with any MedRadio transmitter must be
   supplied with the transmitter and shall be considered part of the
   transmitter subject to equipment authorization. Compliance with these
   EIRP limits may be determined as set forth in § 95.627(g) or § 95.628(h),
   as applicable.

   (g) The maximum field strength authorized for WMTS stations in the
   608-614 MHz band is 200 mV/m, measured at 3 meters. For stations in the
   1395-1400 MHz and 1427-1429.5 MHz bands, the maximum field strength is
   740 mV/m, measured at 3 meters.

   (h) No MURS unit, under any condition of modulation, shall exceed 2
   Watts transmitter power output.

   (i) DSRCS-OBUs are governed under subpart L of this part, except the
   maximum output power for portable DSRCS-OBUs is 1.0 mW. For purposes of
   this paragraph, a portable is a transmitting device designed to be used
   so that the radiating structure(s) of the device is/are within 20
   centimeters of the body of the user.

   [ 53 FR 36789 , Sept. 22, 1988;  53 FR 44144 , Nov. 1, 1988. Redesignated
   at  61 FR 28769 , 28770, June 6, 1996, and further redesignated at  61 FR 46567 , 46569, Sept. 4, 1996]

   Editorial Note: For Federal Register citations affecting § 95.639, see
   the List of CFR Sections Affected, which appears in the Finding Aids
   section of the printed volume and at www.fdsys.gov.

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Certification Requirements

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