A2A: Continuous Wave (CW) Double side-band telegraphy for aural reception, which contains quatized digital information with the use of modulating subcarrier.
A3E: Double side-band single channel analog transmission containing telephony (including sound broadcasting). Commonly known as AM (Amplitude Modulation).
H3E: Single side band, full carrier single channel analog transmission containing telephony (including sound broadcasting).
J3E: Single side band, suppressed carrier single channel analog transmission containing telephony (including sound broadcasting).
R3E: Single side band, reduced or variable-level carrier single channel analog transmission containing telephony (including sound broadcasting).
F3E: Frequency modulated single channel analog transmission containing telephony (including sound broadcasting).
F1B:Frequency modulated single channel telegraphy transmission containing quantized digital information for automatic reception.
F2A: Frequency modulated single channel telegraphy transmission containing quantized digital information for aural reception.
F2B: Frequency modulated single channel telegraphy transmission containing quantized digital information with modulating sub-carrier for automatic reception.
F3C: Frequency modulated single channel analog facsimile transmission.
A3C: Amplitude modulated double side-band single channel analog facsimile transmission.
A3F:
Amplitude modulated double side-band single channel analog video
transmission.
Each letter/digit of the designation of emission represent independent meaning as assigned to them.
| Type of Modulation of the Main Carrier (First Symbol) | Nature of signals modulating the main carrier (Second symbol) | Type of information to be transmitted (Third symbol) |
| A-Double side-band Amplitude
Modulation H-Signle Sideband full carrier R-Single Sideband reduced or variable level carrier J-Single Sideband suppressed carrier F-Frequency Modulation G-Phase Modulation P-Emission of Unmodulated Pulses |
0-No
modulating signal 1-A single channel containing quantized or digital information without the use of a modulating subcarrier. 2-A single channel containing quantized or digital information with the use of a modulating subcarrier 3-A single channel containing analog information |
A-Telegraphy for aural
reception B-Telegraphy for automatic reception C-Facsimile D-Data transmission, telemetry, telecommand E-Telephony (including sound broadcasting F-Television (Video) N-No information transmitted W-Combination of the above X-Cases not covered otherwise |