>unless the automated station has a busy channel detector that detects any 
>mode in its passband and prevents TX until the frequency is clear for a 
>period of time.


OK, tech guys.  How difficult would it be for a soundcard based software 
application to detect a signal present within  ,say, 500 hz of where the 
waterfall is present .  I have NO idea,  but would have though the guys 
bright enough to provide all the wonderful software might have an idea.

GEE, in the middle of typing this ..I was watching TF3GC in an Olivia QSO on 
14105 and a PACTOR station started right on top of him.


Any way, I guess the hard part would be detecting real signals from 
extraneous noise that the short-wave bands produce.  But that noise tends be 
intermittent on a waterfall's display, so maybe the way a real signal like 
PSK31 or RTTY can be detected is via the duration of the signal burst.?  As 
I said, I have NO clue.

Andy  K3UK




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