§ 87.137   Types of emission.

   (a)  The  assignable emissions, corresponding emission designators and
   authorized bandwidths are as follows:
   Class of emission Emission designator Authorized bandwidth (kilohertz)
   Below 50 MHz Above 50 MHz Frequency deviation
   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
   F1D^18 1M30F1D 1300 kHz 312.5 kHz
   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
   M1D 14M0M1D 14.0
   NON NON     None^15
   PON^13 ^9     ^9
   R3E^11 12 2K80R3E 3.0
   XXA^14 1K12XXA 2.74

   Notes:

   ^1A1A, F1B, J2A and J2B are permitted provided they do not cause harmful
   interference to H2B, J3E, J7B and J9W.

   ^2For use with an authorized bandwidth of 8.0 kilohertz at radiobeacon
   stations. A3E will not be authorized:

   (i) At existing radiobeacon stations that are not authorized to use A3 and
   at new radiobeacon stations unless specifically recommended by the FAA for
   safety purposes.

   (ii)  At existing radiobeacon stations currently authorized to use A3,
   subsequent to January 1, 1990, unless specifically recommended by the FAA
   for safety purposes.

   ^3In  the band 117.975-136 MHz, the authorized bandwidth is 25 kHz for
   transmitters approved after January 1, 1974.

   ^4Applicable only to Survival Craft Stations and to the emergency locator
   transmitters and emergency locator transmitter test stations employing
   modulation in accordance with that specified in § 87.141 of the Rules. The
   specified bandwidth and modulation requirements shall apply to emergency
   locator transmitters for which approval is granted after October 21, 1973.

   ^5This emission may be authorized for audio frequency shift keying and phase
   shift  keying  for  digital  data  links  on  any  frequency listed in
   § 87.263(a)(1), § 87.263(a)(3) or § 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 multiplexed on the voice carrier without derogating
   voice communications.

   ^6Applicable 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.

   ^7Applicable to operational fixed stations presently authorized in the band
   73.0-74.6 MHz.

   ^8  The  authorized  bandwidth is equal to the necessary bandwidth for
   frequency  or  digitally  modulated  transmitters used in aeronautical
   telemetering and associated aeronautical telemetry or telecommand stations
   that operate in the 1435-1525 MHz, 2345-2395 MHz, or 5091-5150 MHz band. The
   necessary bandwidth must be computed in accordance with part 2 of this
   chapter.

   ^9To be specified on license.

   ^10H2B must be used by stations employing digital selective calling.

   ^11For A1A, F1B and single sideband emissions, except H2B, the assigned
   frequency must be 1400 Hz above the carrier frequency.

   ^12R3E, 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.

   ^13The letters “K, L, M, Q, V, W, and X” may also be used in place of the
   letter “P” for pulsed radars.

   ^14Authorized for use at radiobeacon stations.

   ^15Applicable only to transmitters of survival craft stations, emergency
   locator transmitter stations and emergency locator transmitter test stations
   approved after October 21, 1973.

   ^16Authorized for use by aircraft earth stations. Lower values of necessary
   and authorized bandwidth are permitted.

   ^17In the band 117.975-137 MHz, the Commission will not authorize any 8.33
   kHz channel spaced transmissions or the use of their associated emission
   designator within the U.S. National Airspace System, except, on an optional
   basis, by Aeronautical Enroute Stations and Flight Test Stations, or by
   avionics equipment manufacturers which are required to perform installation
   and checkout of such radio systems prior to delivery to their customers. For
   transmitters certificated to tune to 8.33 kHz channel spacing as well as 25
   kHz channel spacing, the authorized bandwidth is 8.33 kHz when tuned to an
   8.33 kHz channel.

   ^18Authorized only for Universal Access Transceiver use at 978 MHz.

   (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]

   Editorial Note: For Federal Register citations affecting § 87.137, see the
   List of CFR Sections Affected, which appears in the Finding Aids section of
   the printed volume and at www.fdsys.gov.

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