I think there may be some confusion here. If I'm correct, Brett is referring
to the Scope display, showing the signal in the time domain, not the
panadapter which shows the signal in the frequency domain.
73 de Joe - AB1DO
----- Original Message -----
From: "Jim Barber" <[email protected]>
To: "Brett Gazdzinski" <[email protected]>; "'FLEX USERS'"
<[email protected]>
Sent: Friday, October 23, 2009 18:33
Subject: Re: [Flexradio] new version of psdr
Brett,
I'm trying to figure out what you mean. The PowerSDR panadapter display
shows an AM signal the way I'd expect - you can see the carrier peak in
the middle and the sidebands on each side. You can measure the difference
between the carrier peak and the sidebands in the display to get
modulation. The difference in db can be converted to linear, then
expressed as percentage of modulation, although I'll agree it isn't all
that convenient to do so.
If you're talking about "signal on the scope" as you'd see on an old Heath
or other AM modulation scope, that's a different thing. I agree that
display would be a very useful addition to the PowerSDR arsenal.
Or did I miss the point somewhere?
73,
Jim, N7CXI (a Flex AM enthusiast...)
Brett Gazdzinski wrote:
Tim,
If you are looking at an AM signal on the the scope, it just looks like
an audio waveform, not a modulated AM carrier.
That is what I was talking about.
A display of the audio waveform tells you nothing about how well the AM
signal is modulated.
I guess I should wait till something firm is supported before trying
it....
Love my 5000a, even if it is a month old...
Brett
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