Sec.  87.137   Types of emission.

   (a) The assignable emissions, corresponding emission designators and
   authorized bandwidths are as follows:


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---------------------------------

 Authorized bandwidth (kilohertz)
                                                                              -
---------------------------------
               Class of emission                      Emission designator
 Below 50    Above 50   Frequency

   MHz         MHz      deviation
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---------------------------------
A1A \1\........................................  100HA1A
    0.25
A1N............................................  300HA1N
.........        0.75
A2A............................................  2K04A2A
    2.74        50
A2D............................................  6K0A2D
.........       50
A2D \5\........................................  13K0A2D
.........       50
    A3E \2\....................................  6K00A3E
.........    50\3\
    A3E........................................  5K6A3E
.........        8.33 kHz

              \17\
A3X \4\........................................  3K20A3X
.........       25
A9W \5\........................................  13K0A9W
.........       25
F1B \1\........................................  1K70F1B
    1.7
F1B \1\........................................  2K40F1B
    2.5
F2D............................................  5M0F2D
.........    (\9\)
F3E \6\........................................  16K0F3E
.........       20            5
F3E \7\........................................  36K0F3E
.........       40           15
F7D \8\........................................  5M0F7D
.........    (\9\)
F9D............................................  5M0F9D
.........      \9\
G1D............................................  16K0G1D
.........   20 kHz
G1D \16\.......................................  21K0G1D
.........       25
G1D............................................  14K0G1D
.........       25
F9D............................................  5M0F9D
.........      \9\
G1D............................................  16K0G1D
.........   20 kHz
G3E \6\........................................  16K0G3E
.........       20            5
G7D............................................  14K0G7D
.........       25
H2B \10\ \11\..................................  2K80H2B
    3.0
H3E \11\ \12\..................................  2K80H3E
    3.0
J2A \1\........................................  100HJ2A
    0.25
J2B \1\........................................  1K70J2B
    1.7
                                                 2K40J2B
    2.5
J3E \11\ \12\..................................  2K80J3E
    3.0
J7B \11\.......................................  2K80J7B
    3.0
J7D............................................  5M0J7D
.........    (\9\)
J9W \11\.......................................  2K80J9W
    3.0
M1A............................................  620HM1A
NON............................................  NON
.........  None \15\
PON \13\.......................................  (\9\)
.........    (\9\)
R3E \11\ \12\..................................  2K80R3E
    3.0
XXA \14\.......................................  1K12XXA
    2.74
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---------------------------------
Notes:
\1\ A1A, F1B, J2A and J2B are permitted provided they do not cause harmful inte
rference to H2B, J3E, J7B and
  J9W.
\2\ For use with an authorized bandwidth of 8.0 kilohertz at radiobeacon statio
ns. A3E will not be authorized:
(i) At existing radiobeacon stations that are not authorized to use A3 and at n
ew radiobeacon stations unless
  specifically recommended by the FAA for safety purposes.
(ii) At existing radiobeacon stations currently authorized to use A3, subsequen
t to January 1, 1990, unless
  specificallly recommended by the FAA for safety purposes.
\3\ In the band 117.975-136 MHz, the authorized bandwidth is 25 kHz for transmi
tters approved after January 1,
  1974.
\4\ Applicable only to Survival Craft Stations and to the emergency locator tra
nsmitters and emergency locator
  transmitter test stations employing modulation in accordance with that specif
ied in  Sec.  87.141 of the
  Rules. The specified bandwidth and modulation requirements shall apply to eme
rgency locator transmitters for
  which approval is granted after October 21, 1973.
\5\ This emission may be authorized for audio frequency shift keying and phase
shift keying for digital data
  links on any frequency listed in  Sec.  87.263(a)(1),  Sec.  87.263(a)(3) or  Sec.  87.263(a
)(5). 13K0A2D
  emission may be authorized on frequencies not used for voice communications.
If the channel is used for voice
  communications, 13K0A9W emission may be authorized, provided the data is mult
iplexed on the voice carrier
  without derogating voice communications.
\6\ Applicable to operational fixed stations in the bands 72.0-73.0 MHz and 75.
4-76.0 MHz and to CAP stations
  using F3 on 143.900 MHz and 148.150 MHz.
\7\ Applicable to operational fixed stations presently authorized in the band 7
3.0-74.6 MHz.
\8\ The authorized bandwidth is equal to the necessary bandwidth for frequency
or digitally modulated
  transmitters used in aeronautical telemetering and associated aeronautical te
lemetry or telecommand stations
  operating in the 1435-1535 MHz and 2310-2390 MHz bands. The necessary bandwid
th must be computed in accordance
  with part 2 of this chapter.
\9\ To be specified on license.
\10\ H2B must be used by stations employing digital selective calling.
\11\ For A1A, F1B and single sideband emissions, except H2B, the assigned frequ
ency must be 1400 Hz above the
  carrier frequency.
\12\ R3E, H3E, and J3E will be authorized only below 25000 kHz. Only H2B, J3E,
J7B, and J9W are authorized,
  except that A3E and H3E may be used only on 3023 kHz and 5680 kHz for search
and rescue operations.
\13\ The letters ``K, L, M, Q, V, W, and X'' may also be used in place of the l
etter ``P'' for pulsed radars.
\14\ Authorized for use at radiobeacon stations.
\15\ Applicable only to transmitters of survival craft stations, emergency loca
tor transmitter stations and
  emergency locator transmitter test stations approved after October 21, 1973.
\16\ Authorized for use by aircraft earth stations. Lower values of necessary a
nd authorized bandwidth are
  permitted.
\17\ In the band 117.975-137 MHz, the Commission will not authorize any 8.33 kH
z channel spaced transmissions or
  the use of their associated emission designator within the U.S. National Airs
pace System, except by avionics
  equipment manufacturers, and Flight Test Stations, which are required to perf
orm installation and checkout of
  such radio systems prior to delivery to their customers for use outside U.S.
controlled airspace. For
  transmitters certificated to tune to 8.33 kHz channel spacing as well as 25 k
Hz channel spacing, the
  authorized bandwidth is 8.33 kHz when tuned to an 8.33 kHz channel.

   (b) For other emissions, an applicant must determine the emission designator
   by using part 2 of this chapter.

   (c) A license to use radiotelephony includes the use of tone signals or
   signaling devices whose sole function is to establish or maintain voice
   communications.

   [ 53 FR 28940 , Aug. 1, 1988, as amended at  55 FR 7333 , Mar. 1, 1990;  55 FR 13535 , Apr. 11, 1990;  55 FR 28627 , July 12, 1990;  56 FR 11518 , Mar. 19,
   1991;  57 FR 45749 , Oct. 5, 1992;  58 FR 30127 , May 26, 1993;  63 FR 36607 ,
   July 7, 1998;  63 FR 68957 , Dec. 14, 1998;  64 FR 27475 , May 20, 1999;  66 FR 26799 , May 15, 2001;  69 FR 32881 , June 14, 2004]