Guess you could mix data with voice but I took it to mean the use of a control channel.
20K0F9W
20K0 bandwidth
F Frequency modulation
9 Composite system with one or more channels containing quantized or digital information, together with one or more channels containing analog information
W Combination of the above (Telegraphy - for aural reception, Telegraphy- for automatic reception, Facsimile, Data transmission, telemetry, telecommand, Telephony ( including sound broadcasting) Television (video))
_________________ "A well regulated breakfast, being necessary to the healthy start of the day, the right of the people to keep and eat food shall not be infringed."
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