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
