Goto Section: 90.205 | 90.209 | Table of Contents
FCC 90.207
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 90.207 Types of emissions.
Unless specified elsewhere in this part, stations will be authorized
emissions as provided for in paragraphs (b) through (n) of this section.
(a) Most common emission symbols. For a complete listing of emission symbols
allowable under this part, see Sec. 2.201 of this chapter.
(1) The first symbol indicates the type of modulation on the transmitter
carrier.
A—Amplitude modulation, double sideband with identical information on each
sideband.
F—Frequency modulation.
G—Phase modulation.
J—Single sideband with suppressed carrier.
P—Unmodulated pulse.
W—Cases not covered above, in which an emission consists of the main carrier
modulated, either simultaneously or in a pre-established sequence, in a
combination of two or more of the following modes: amplitude, angle, pulse.
(2) The second symbol indicates the type of signal modulating the
transmitter carrier.
0—No modulation.
1—Digital modulation, no subcarrier.
2—Digital modulation, modulated subcarrier.
3—Analog modulation.
(3) The third symbol indicates the type of transmitted information.
A—Telegraphy for aural reception.
B—Telegraphy for machine reception.
C—Facsimile.
D—Data, telemetry, and telecommand.
E—Voice.
N—No transmitted information.
W—Combination of the above.
(b) Authorizations to use A3E, F3E, or G3E emission also include the use of
emissions for tone signals or signaling devices whose sole functions are to
establish and to maintain communications, to provide automatic station
identification, and for operations in the Public Safety Pool, to activate
emergency warning devices used solely for the purpose of advising the
general public or emergency personnel of an impending emergency situation.
(c) The use of F3E or G3E emission in these services will be authorized only
on frequencies above 25 MHz.
(d) Except for Traveler's Information stations in the Public Safety Pool
authorized in accordance with Sec. 90.242, only J3E emission will be authorized
for telephony systems on frequencies below 25 MHz.
(e) For non-voice paging operations, only A1A, A1D, A2B, A2D, F1B, F1D, F2B,
F2D, G1B, G1D, G2B, or G2D emissions will be authorized.
(f) For radioteleprinter operations that may be authorized in accordance
with Sec. 90.237, only F1B, F2B, G1B or G2B emissions will be authorize above 25
MHz, and A1B or A2B emissions below 25 MHz.
(g) For radiofacsimile operations that may be authorized in accordance with
Sec. 90.237, only F3C or G3C emissions will be authorized above 25 MHz, and A3C
emissions below 25 MHz.
(h) [Reserved]
(i) For telemetry operations, when specifically authorized under this part,
only A1D, A2D, F1D, or F2D emissions will be authorized.
(j) For call box operations that may be authorized in accordance with
Sec. 90.241, only A1A, A1D, A2B, A2D, F1B, F1D, F2B, F2D, G1B, G1D, G2B, G2D,
F3E or G3E emissions will be authorized.
(k) For radiolocation operations as may be authorized in accordance with
subpart F, unless otherwise provided for any type of emission may be
authorized upon a satisfactory showing of need.
(l) For stations in the Public Safety and Industrial/Business Pools
utilizing digital voice modulation, in either the scrambled or unscrambled
mode, F1E or G1E emission will be authorized. Authorization to use digital
voice emissions is construed to include the use of F1D, F2D, G1D, or G2D
emission subject to the provisions of Sec. 90.233.
(m) For narrowband operations in a 3.6 kHz maximum authorized bandwith, any
modulation type may be used which complies with the emission limitations of
Sec. 90.209.
(n) Other emissions. Requests for emissions other than those listed in
paragraphs (c) through (e) of this section will be considered on a
case-by-case basis to ensure that the requested emission will not cause more
interference than other currently permitted emissions.
[ 49 FR 48711 , Dec. 14, 1984, as amended at 50 FR 13606 , Apr. 5, 1985; 50 FR 25240 , June 18, 1985; 52 FR 29856 , Aug. 12, 1987; 54 FR 38681 , Sept. 20,
1989; 60 FR 15252 , Mar. 23, 1995; 60 FR 37263 , July 19, 1995; 62 FR 2039 ,
Jan. 15, 1997; 62 FR 18927 , Apr. 17, 1997; 64 FR 36270 , July 6, 1999; 72 FR 35194 , June 27, 2007]
Goto Section: 90.205 | 90.209
Goto Year: 2007 |
2009
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