Mark,
This is normal. What you are seeing is the AM station carrier beating
against the SDR (just like an analog receiver with the bfo on). If you
switch the SDR to SAM mode it will sync the SDR and the carrier and you will
have great sounding AM.
Jerry WK0J
----- Original Message -----
From: "Mark Ericksen" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, March 28, 2006 12:06 AM
Subject: [Flexradio] SDR-1000 and AM Reception
I have had my SDR-1000 for a few weeks now and I am learning all of its
"bells and wistles." I am currentlly putting up a new Ham antenna and in
the mean time I am just using a wire strung around my den as an antenna. I
have been listening to AM stations as well as ham stations. I have noticed
that while listening to AM stations if I switch the display mode to Scope I
see the detected AM audio riding on a low frequency sin wave. As I detune
the radio the frequency of the sine wave increases. The audio from the
station is not modulating this sin wave but simply adding to or riding on
it. I have performed the Frequency, Level, and Receive Image Reject
calibrations using an Elecraft XG2 test oscillator. I get this behavior
regardless of the version of PowerSDR.
Can someone tell me what I am seeing and why? Is this normal?
Thanks
Mark Ericksen
AD4MA
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