Goto Section: 90.242 | 90.245 | Table of Contents
FCC 90.243
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 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, medical services systems in the 150–160 MHz
band are permitted to be cross-banded for mobile and central stations
operations with mobile relay stations authorized to operate in the 450–470
MHz band.
(2) [Reserved]
(3) 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),
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 Sec. 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 Sec. 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 Sec. 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]
Goto Section: 90.242 | 90.245
Goto Year: 2007 |
2009
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