Re: Rocky SDR software
> The shape changes from mode to mode slightly, and more so when IYeah, this does look to me like the audio feedback I described.
> slide the spectrum, and even more so when I change to zoom slider -
> from 600Hz down to 20Hz. Changing the volume to max alters the shape
> dramaticaly - see grab 7054-3.
Changing modes probably changes the appearance because of the change
to the filter width and position. Changes due to change in volume
are a rather obvious result.
In my case, both the detected audio out and the I/Q in ran through
Tony's D44 interface and the original grounding configuration allowed
audio output current to flow on the I/Q input shields, coupling
output audio onto the I/Q signal.
In your case, I believe you are operating with nothing connected to
the I/Q input, so it probably makes it easy to pick up the audio.
Try terminating the I/Q input (or grounding these inputs).