Re: 80m used for trials of 24 kHz B/W data
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At some point in time someone decided to call rtty and maybe some other modes that come out of a ssb transmitter when fed into the microphone or audio of a ssb transmitter AFSK. It is not AFSK.
It is what comes out of the transmitter and makes it out the antenna that counts. Many rigs do not generate Morse code by turning the carrier off and on like the older ones. They key an internal audio oscillator off and on. The results at the antenna is the same as turning the transmitter off and on.
As far as the FCC is concerned, it does not mater how you actually generate a signal, it is what leaves the antenna that defines the mode.