Goto Section: 90.242 | 90.245 | Table of Contents
FCC 90.243
Revised as of October 1, 2011
Goto Year:2010 |
2012
§ 90.243 Mobile relay stations.
(a) Mobile relay operations will be authorized on frequencies below 512
MHz, except in the Radiolocation Service.
(b) Special provisions for mobile relay operations:
(1) In the Public Safety Pool, systems operating on any of the public
safety frequencies listed in § 90.20(c) are permitted to be
cross-banded for mobile stations operations with mobile relay stations
where such stations are authorized.
(2) [Reserved]
(3) In the Industrial/Business Pool, on frequencies designated with an
"LR" in the coordinator column of the frequency table in § 90.35(b)(3),
mobile relay operation shall be on a secondary basis to other
co-channel operations.
(4) Except where specifically precluded, a mobile relay station may be
authorized to operate on any frequency available for assignment to base
stations.
(5) A mobile station associated with mobile relay station(s) may not be
authorized to operate on a frequency below 25 MHz.
(c) Technical requirements for mobile relay stations.
(1) Each new mobile relay station with an output power of more than one
watt, and authorized after January 1, 1972, that is activated by
signals below 50 MHz shall deactivate the station upon cessation of
reception of the activating continuous coded tone signal. Licensees may
utilize a combination of digital selection and continuous coded tone
control where required to insure selection of only the desired mobile
relay station.
(2) Mobile relay stations controlled by signals above 50 MHz or
authorized prior to January 1, 1972, to operate below 50 MHz are not
required to incorporate coded signal or tone control devices unless the
transmitters are consistently activated by undesired signals and cause
harmful interference to other licensees. If activation by undesired
signals causes harmful interference, the Commission will require the
installation of tone control equipment within 90 days of a notice to
the licensee.
(3) Except in the Industrial/Business Pool, on frequencies designated
with an "LR" in the coordinator column of the frequency table in
§ 90.35(b)(3), each new mobile-relay station authorized after January
1, 1972, shall be equipped for automatic deactivation of the
transmitter within 5 seconds after the signals controlling the station
cease.
(4) Except in the Industrial/Business Pool, on frequencies designated
with an "LR" in the coordinator column of the frequency table in
§ 90.35(b)(3), each new mobile-relay station authorized after January
1, 1972, during periods that is not controlled from a manned fixed
control point; shall have an automatic time delay or clock device that
will deactivate the station not more than 3 minutes after its
activation by a mobile unit.
(5) In the Industrial/Business Pool, on frequencies designated with an
"LR" in the coordinator column of the frequency table in § 90.35(b)(3),
each mobile relay station, regardless of the frequency or frequencies
of the signal by which it is activated shall be so designated and
installed that it will be deactivated automatically when its associated
receiver or receivers are not receiving a signal on the frequency or
frequencies which normally activate it.
(6) Multiple mobile relay station radio systems shall use wireline or
radio stations on fixed frequencies for any necessary interconnect
circuits between the mobile relay stations.
[ 43 FR 54791 , Nov. 22, 1978, as amended at 49 FR 40177 , Oct. 15, 1984;
50 FR 13606 , Apr. 5, 1985; 50 FR 39680 , Sept. 30, 1985; 50 FR 40976 ,
Oct. 8, 1985; 54 FR 39740 , Sept. 28, 1989; 56 FR 19603 , Apr. 29, 1991;
56 FR 32517 , July 17, 1991; 60 FR 37268 , July 19, 1995; 61 FR 6576 ,
Feb. 21, 1996; 62 FR 18928 , Apr. 17, 1997; 74 FR 23803 , May 21, 2009]
Goto Section: 90.242 | 90.245
Goto Year: 2010 |
2012
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