jgpo@iwu1c.UUCP (06/24/83)
As a result of WARC 79, the very familiar signals of the emissions modes will be changed. The FCC will be implementing the following new symbols over the next several years. Old Symbol New Symbol Old Symbol New Symbol A0 N0N F0 N0N A1 A1A F1 F1B A2 A2A F2 F2A A2D F2D A2J J2A F3 F3E J2D F4 F3C A3 A3E F5 F3F A3J J3E P P1B A4 A3C A5 C3F A3F Symbol Explanation: First character indicates emission type Second character indicates the nature of the signal Third character indicates the type of information transmitted First Character N = Unmodulated carrier A = Double sideband AM J = Single sideband, suppressed carrier F = Frequency modulation P = Sequence of unmodulated pulses C = Vestigial sidebands Second Character 0 = No modulating signal 1 = Single channel containing digital information without the use of a modulating subcarrier 2 = Same as above, except using a modulating subcarrier 3 = Single channel containing analog information Third Character N = No information transmitted A = Telegraphy -- aural reception B = Telegraphy -- automatic reception C = Facsimile D = Data transmission, telemetry, telecommand E = Telephony F = Television Example: A1A is double sideband, single channel containing digital information without the use of a modulating subcarrier, telegraphy for aural reception. In other words, CW! Tnx to Bill, WD9BBI for the above information. Isn't progress wonderful? 73, John, KA9MNK