Goto Section: 90.235 | 90.238 | Table of Contents
Revised as of October 28, 2020
Goto Year:2020 |
§ 90.237 Interim provisions for operation of radioteleprinter and
These provisions authorize and govern the use of radioteleprinter and
radiofacsimile devices for base station use (other than on mobile-only
or paging-only frequencies) in all radio pools and services except
Radiolocation in this part.
(a) Information must be submitted with an application to establish that
the minimum separation between a proposed radioteleprinter or
radiofacsimile base station and the nearest co-channel base station of
another licensee operating a voice system is 120 km (75 mi) for a
single frequency mode of operation, or 56 km (35 mi) for two frequency
mode of operation. Where this minimum mileage separation cannot be
achieved, either agreement to the use of F1B, F2B, F3C, G1B, G2B or G3C
emission must be received from all existing co-channel licensees using
voice emission within the applicable mileage limits, or if agreement
was not received, the licensee of the radioteleprinter or
radiofacsimile system is responsible for eliminating any interference
with preexisting voice operations. New licensees of voice operations
will be expected to share equally any frequency occupied by established
radioteleprinter or radiofacsimile operations.
(c) Transmitters certificated under this part for use of G3E or F3E
emission may also be used for F1B, F2B, F3C, G1B, G2B or G3C emission
for radioteleprinter or radiofacsimile, provided the keying signal is
passed through the low pass audio frequency filter required for G3E or
F3E emission. The transmitter must be so adjusted and operated that the
instantaneous frequency deviation does not exceed the maximum value
allowed for G3E or F3E.
(d) Frequencies will not be assigned exclusively for F1B, F2B, F3C,
G1B, G2B or G3C emission for radioteleprinter or radiofacsimile (except
where specifically provided for in the frequency limitations).
(e) The requirements in this part applicable to the use of G3E or F3E
emission are also applicable to the use of F1B, F2B, F3C, G1B, G2B or
G3C emission for radioteleprinter and radiofacsimile transmissions.
(f) The station identification required by § 90.425 must be given by
voice or Morse code.
(g) For single sideband operations in accordance with § 90.266,
transmitters certified under this part for use of J3E emission may also
be used for A2B and F2B emissions for radioteleprinter transmissions.
Transmitters certified under this part for use of J3E emission in
accordance with § § 90.35(c)(1)(A), 90.35(c)(1)(B), 90.35(c)(1)(C) and
90.257(a) may also be used for A1B, A2B, F1B, F2B, J2B, and A3C
emissions to provide standby backup circuits for operational
telecommunications circuits which have been disrupted, where so
authorized in other sections of this part.
[ 43 FR 54791 , Nov. 22, 1978, as amended at 49 FR 48712 , Dec. 14, 1984;
51 FR 14998 , Apr. 22, 1986; 62 FR 18927 , Apr. 17, 1997; 63 FR 36610 ,
July 7, 1998; 63 FR 68965 , Dec. 14, 1998; 72 FR 35195 , June 27, 2007]
Goto Section: 90.235 | 90.238
Goto Year: 2020 |
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