Goto Section: 90.635 | 90.645 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 90.637 Restrictions on operational fixed stations.
(a) Except for control stations, operational fixed operations will not
be authorized in the 806-824 MHz, 851-869 MHz, 896-901 MHz, or 935-940
MHz bands. This does not preclude secondary fixed tone signaling and
alarm operations authorized in § 90.235 or in paragraph (c) of this
(b) Control stations associated with one or more mobile relay stations
will be authorized only on the assigned frequency of the associated
mobile station. Use of a mobile service frequency by a control station
of a mobile relay system is subject to the condition that harmful
interference shall not be caused to stations of licensees authorized to
use the frequency for mobile service communications.
(c) Trunked and conventional systems that have exclusive-use status in
their respective geographic areas may conduct fixed ancillary signaling
and data transmissions subject to the following requirements:
(1) All operations must be on a secondary, non-interference basis to
the primary mobile operation of any other licensee.
(2) The output power at the remote site must not exceed 30 watts.
(3) Any fixed transmitters will not count toward meeting the mobile
loading requirements nor be considered in whole or in part as a
justification for authorizing additional frequencies in the licensee's
(4) Automatic means must be provided to deactivate the remote
transmitter in the event the carrier remains on for a period in excess
of three minutes.
(5) Operational fixed stations authorized pursuant to the provisions of
paragraphs (c) and (d) of this section are exempt from the requirements
of § § 90.425 and 90.429.
(d) Conventional systems that do not have exclusive-use status in their
respective geographic areas may conduct fixed ancillary signaling and
data transmissions only in accordance with all the provisions of
[ 47 FR 41032 , Sept. 16, 1982, as amended at 48 FR 51929 , Nov. 15, 1983;
49 FR 36377 , Sept. 17, 1984; 51 FR 37405 , Oct. 22, 1986; 52 FR 1332 ,
Jan. 13, 1987; 53 FR 12157 , Apr. 13, 1988; 57 FR 34693 , Aug. 6, 1992]
Goto Section: 90.635 | 90.645
Goto Year: 2020 |
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