Look at the receiver output of the background galactic white noise using the waterfall of ANY digital protocol. ?
It should fall off under 500 Hz. ??
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Thanks I¡¯ll give that a try and see how that goes.
This suggests that you BFO is putting the audio too close to the SSB filter.? I ran a number of tests when checking out my SDRPlay as a signal analyzer and found the same thing.? I had to adjust the BFO lower in frequency to remove the carrier.?
That of course raised the audio "tone" of the received signal.? It became a balance between sound quality and carrier reduction.
Not sure how to do this without a SA.? Maybe try a 500hz adjustment and check PTT output without any sound.? Repeat by changing by another +/-100 hz? until it is just barely measurable and back up the 100 hz.? I did that method using the SA to measure output.?
Ultimately my BFO setting was 11.995500 for the v4 vs the stock 11.997000.? I was able to get the carrier below -30db from the two tone signal.
Above are my experiences, yours maybe different.
73
Evan
AC9TU
