开云体育

Good morn (here On the banks of the Piscataqua, anyway ;-)
Thanks for the reply.
Tobias earlier reported in a different thread on a related subject:
"Your wav file signal looks exactly as expected: a leading short (1 second) center frequency tune tone, followed by the (non-)message consisting of the (idle) dual-tone pair of BPSK125 and then the trailing short (1 second) center frequency tune tone again."

So I now understand what fldigi sends when it is idle...and the idle audio will vary with the modem in use. Sounds like the leading and trailing (1 second) center frequency tune tone is also default. Not sure why the trailing tone, but perhaps to make sure that PTT is not dropped too soon. Those leading, trailing 1 s tones are not a burden.

This all came about because I decided to test my hardware in a way I had not previously, and was surprised by the results. I now see that everything is operating just FB.

73 Rich NE1EE
The Dusty Key
On the banks of the Piscataqua