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Years ago I used fldigi under linux but recently wanted to try it under windows.? I was not expecting harmonics (low level though, <-60dbc ) far away from the carrier in the waterfall when I transmit.? ?The picture below is with no transceiver connected -- only the output of fldigi affecting the waterfall:
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When I look at the waveform, I notice a regular notch in the envelope (see below).? ?Has anybody else seen this?? I have the soundcard sample rates set to "native".
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Thanks,
Curt
