Sec.  90.247   Mobile repeater stations.

   A mobile station authorized to operate on a mobile service frequency above
   25 MHz may be used as a mobile repeater to extend the communications range
   of hand-carried units subject to the following:

   (a) Mobile repeaters and/or associated hand-carried transmitters may be
   assigned separate base/mobile frequencies for this use in addition to the
   number of frequencies normally assignable to the licensee.

   (b) In the Industrial/Business Pool, on frequencies below 450 MHz, only low
   power frequencies (2 watts or less output power) may be assigned for use by
   mobile repeaters or by hand-carried transmitters whose communications are
   directed to mobile repeaters, when separate frequencies are assigned for
   that purpose.

   (c) Except as provided in paragraph (d) of this section, hand-carried
   transmitters whose communications will be automatically relayed by mobile
   stations shall be limited to a maximum output power of 2.5 watts.

   (d) In the Industrial/Business Pool, on frequencies designated with an
   “LR” in the coordinator column of the frequency table in  Sec. 90.35(b)(3), use
   of mobile repeaters is on a secondary basis to the stations of any other
   licensee. Hand carried units used in connection with mobile repeaters on
   frequencies designated with an “LR” in the coordinator column of the
   frequency table in  Sec. 90.35(b)(3) may operate only above 150 MHz and are
   limited to a maximum output power of six watts. The frequency and maximum
   power shall be specified in the station authorization.

   (e) In the Industrial/Business Pool, on frequencies designated with an
   “LR” in the coordinator column of the frequency table in  Sec. 90.35(b)(3), the
   output power of a mobile repeater station, when transmitting as a repeater
   station on the frequency used for communication with its associated
   pack-carried or hand-carried units, shall not exceed 6 watts except when the
   same frequency is also used by the same station for direct communication
   with vehicular mobile units or with one or more base stations.

   (f) When automatically retransmitting messages originated by or destined for
   hand-carried units, each mobile station shall activate the mobile
   transmitter only with a continuous coded tone, the absence of which will
   de-activate the mobile transmitter. The continuous coded tone is not
   required when the mobile unit is equipped with a switch that activates the
   automatic mode of the mobile unit and an automatic time-delay device that
   de-activates the transmitter after any uninterrupted transmission period in
   excess of 3 minutes.

   [ 43 FR 54791 , Nov. 22, 1978, as amended at  62 FR 18928 , Apr. 17, 1997]