| A1 | A - Double-sideband 1 - a single channel containing quantized or digital information without the use of a modulating sub-carrier | |
| A1A | A- Telegraphy - for aural reception | CW (на слух) |
| A1B | B - Telegraphy - for automatic reception | CW (бърза) |
| A1C | C - Facsimile | FAX |
| A1D | D - Data transmission, telemetry, telecommand | CW(DSB) |
| A2 | A- Double-sideband 2- a single channel containing quantized or digital information with the use of a modulating sub-carrier | |
| A2A | A- Telegraphy - for aural reception | CW |
| A2B | B - Telegraphy - for automatic reception | CW |
| A2C | C - Facsimile | FAX |
| A2D | D - Data transmission, telemetry, telecommand | |
| A3 | A- Double-sideband3- a single channel containing analogue information | |
| A3C | C - Facsimile | FAX |
| A3E | E - Telephony (including sound broadcasting) | AM |
| F1 | F - Frequency modulation, 1 - a single channel containing quantized or digital information without the use of a modulating sub-carrier | |
| F1A | A- Telegraphy - for aural reception | CW |
| F1B | B - Telegraphy - for automatic reception | RTTY(FSK), SITOR-A, BAUDOT, FSK-Hell |
| F1C | C - Facsimile | FAX |
| F2 | F- Frequency modulation, 2 - a single channel containing quantized or digital information with the use of a modulating sub-carrier | |
| F2A | A- Telegraphy - for aural reception | CW |
| F2C | C - Facsimile | FAX |
| F2D | D - Data transmission, telemetry, telecommand | PACKED(FSK) |
| F3 | F - Frequency modulation, 3- a single channel containing analogue information | |
| F3C | C - Facsimile | FAX |
| F3E | E - Telephony (including sound broadcasting) | FM |
| F3F | F - Television (video) | SSTV |
| G3 | G- Phase modulation, 3 - a single channel containing analogue information | |
| G3C | C - Facsimile | FAX |
| G3E | E - Telephony (including sound broadcasting) | |
| G3F | F - Television (video) | |
| J2 | J - Single-sideband, suppressed carrier, 2 - a single channel containing quantized or digital information with the use of a modulating sub-carrier | |
| J2A | A- Telegraphy - for aural reception | CW |
| J2B | B - Telegraphy - for automatic reception | CW |
| J2C | C - Facsimile | FAX |
| J2D | D - Data transmission, telemetry, telecommand | Clover |
| J3 | J - Single-sideband, suppressed carrier, 3 - a single channel containing analogue information | |
| J3C | C - Facsimile | FAX |
| J3E | E - Telephony (including sound broadcasting) | SSB |
| J3F | F - Television (video) | ATV |
| R3 | R - Single-sideband, reduced or variable level carrier, 3 - a single channel containing analogue information | |
| R3C | C - Facsimile | FAX |
| R3E | E - Telephony (including sound broadcasting) | SSB намалена носеща |
Radio emissions are defined with an alphamumeric code, for example:
A1A is an ON/OFF keyed carrier (as in
"CW" "Morse")
A3E is double-sideband with full carrier ("AM", "broadcast")
J3E is single-sideband ("SSB") suppressed carrier
F3E is frequency modulation telephony;
F2D: frequency shift keyed audio tone, data packet. Packet Radio.
COMMONLY USED TYPES ARE:
A1A -telegraphy (on - off keying) without modulation by an audio frequency;
A1B - amplitude modulation telegraphy with automatic reception, without using a modulating subcarrier;
A1D -amplitude modulation data transmission, double sideband, without using a modulating subcarrier;
A2A -on-off keying telegraphy using one or several modulating audio frequencies, or on-off keying telegraphy of an amplitude modulated emission;
A2B -amplitude modulation telegraphy with automatic reception and using on-off keying of the modulating subcarrier;
A2D -amplitude modulation data transmission, double sideband and using a modulating subcarrier;
A3C -amplitude modulation facsimile; the main carrier is modulated either directly or by a frequency modulated subcarrier;
A3E -amplitude modulation telephony, double sideband;
C3F -television, in amplitude modulation, with vestigial sideband;
F1A - telegraphy (keyed by frequency variation);
F1B -frequency modulation telegraphy with automatic reception, without using a modulating subcarrier;
F1D -frequency modulation data transmission, double sideband, without using a modulating subcarrier;
F2A - on-off keying telegraphy of an audio frequency for frequency modulation, or by on-off keying of a frequency modulated emission (special case: unkeyed frequency modulated emission);
F2B -frequency modulation telegraphy with automatic reception and using on-off keying of the modulating subcarrier;
F2D -frequency modulation data transmission, using a modulating subcarrier;
F3C - modulation frequency facsimile, by direct modulation of carrier frequency;
F3E - frequency modulation telephony;
F3F - television with frequency modulation;
G1D -phase modulation data transmission, without using a modulating subcarrier;
G2D -phase modulation data transmission, using a modulating subcarrier;
G3C -phase modulation facsimile:
G3E -phase modulation telephony;
G3F -television in phase modulation;
J1D -amplitude modulation data transmission, single sideband, suppressed carrier, using a modulating subcarrier;
J2A -on-off keying telegraphy using one or several modulating audio frequencies, or an on-off keying telegraphy, single sideband, with suppressed carrier;
J2D -amplitude modulation data transmission, single sideband, suppressed carrier without using a modulating subcarrier;
J3C - amplitude modulation facsimile; single sideband, with suppressed carrier;
J3E -amplitude modulation telephony, single sideband, with suppressed carrier;
J8E -amplitude modulation telephony, independent sidebands;
K1A -on-off keying telegraphy of a carrier transmitted by pulses, without modulation by an audio frequency;
K2A -on-off keying telegraphy of one or several audio modulating frequencies, or by on-off keying of a modulated carrier transmitted by pulses (special case: unkeyed modulated carrier transmitted by pulses);
K3E - pulse modulation telephony.
R3C - amplitude modulation facsimile; single sideband, with vestigial carrier;
R3D -amplitude modulation data transmission, single sideband, with vestigial carrier;
R3E -amplitude modulation telephony, single sideband, with vestigial carrier;
Copyright © 1999 LZ1III