§ 80.873   VHF radiotelephone transmitter.

   (a) The transmitter must be capable of transmission of G3E emission on
   156.300 MHz and 156.800 MHz, and on frequencies which have been specified
   for use in a system established to promote safety of navigation. Vessels in
   waters of other Administrations are required to communicate on any channel
   designated by that Administration for navigational safety in the bands
   specified in § 80.871(d).

   (b) The transmitter must be adjusted so that the transmission of speech
   normally produces peak modulation within the limits of 75 percent and 100
   percent.

   (c) The transmitter must deliver a carrier power between 8 and 25 watts into
   a 50 ohm effective resistance. Provision must be made for reducing the
   carrier power to a value between 0.1 and 1.0 watts.

   (d) The transmitter complies with the power output requirements specified in
   paragraph (c) of this section when:

   (1) The transmitter is capable of being adjusted for efficient use with an
   actual  ship  station transmitting antenna meeting the requirements of
   § 80.876; and

   (2) The transmitter has been demonstrated capable, with normal operating
   voltages applied, of delivering not less than 8 watts of carrier power into
   50  ohms  effective  resistance  over  the frequency band specified in
   § 80.871(d). An individual demonstration of the power output capability of
   the transmitter, with the radiotelephone installation normally installed on
   board ship, may be required; and

   (3) It is certificated as required by subpart F of this part.

   [ 51 FR 31213 , Sept. 2, 1986, as amended at  63 FR 36607 , July 7, 1998]

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