Transmit over TCI is confirmed on a SunSDR: 80 W out of a 1 kHz tone at
70% of full scale into 80% drive, every request answered.
Which makes the earlier rule wrong. 'Digital modes only' came from a real
observation — SSB silent four times over, DIGU answering at once — but the
mode was a coincidence. ExpertSDR3 has a transmit audio SOURCE, microphone
or TCI, kept per mode, and it was on the microphone in SSB. Refusing SSB
would have blocked the one thing a voice keyer exists for.
So nothing is refused on the strength of the mode. The radio declares what
it wants by asking for audio, 47 times a second when it wants any: key,
wait for one request, and stop within two tenths of a second if none
comes — naming the setting to change rather than theorising about it.
That is better on three counts. It works in SSB when the source is set
right, it cannot be wrong about a mode nobody thought to test (AM, FM,
RTTY), and a misconfiguration costs a quarter-second of carrier instead of
five seconds.
rouggy
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