On Sat, Nov 03, 2018 at 08:14:36PM -0700, Don - KM4UDX wrote:
Raj, Diane, and the group:? I got a better picture and annotated the signals.?
You also asked if I could TX without any audio. So I just hit the PTT with no voice and got a picture. I can see a what I think is a carrier. But I must defer to experts! I've tried to both insert and attach pictures. Thank you!!!
Yes that's your suppressed carrier.
What I see is two sidebands of crud as well as your main signal
at 500 Hz away from the suppressed carrier. It's hard to tell but the
two sidebands look inverted from each other to me. I'd be looking at what the
audio going into the radio looks like next. Here I am making the assumption
the sideband filter is not knocking down the opposite sideband and
close to the suppressed carrier properly. If the audio going in does
not have that ~500Hz component then it must be in the radio.
Also, have you aligned the radio? That lower sideband looks a smidgen stronger
than the upper sideband to me.
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- db@... db@...
