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Re: QMX(+) Build experience, Poor Audio Filter Sweep/RF Filter Sweep/Image Sweep/ADC IQ test and resolution with new PCM1804

 

So maybe I have an IC407/PCM1804 failure on a QMX+ REV1 board? Audio, RF, image and Test ADC I/Q sweeps are all static, random noise plots while LPF is better than any of the three or four QRP Labs transceivers I have built yet. SWR is kinda okay and receive is loud noise.
?
What say you? I will try the voltage and mayne the scope checks...
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73
Karl
KI4ZUQ
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