Troubleshooting ADX-S Receiver Noise
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I'm using my ADX-S with a DigiRig and WSJT-X running on both Armbian OS and MacOS machines. I have successfully completed FT8 QSOs and have been spotted transmitting WSPR. However in all modes I'm encountering what appears to be persistent harmonic noise across the spectrum. I've done everything possible to eliminate possible noise sources in the shack by shutting down and disconnecting as much equipment as possible when testing with the ADX-S. When using my other transceivers (FT-817ND and the IC-7300) I have no indications of any spurious noise injection or RFI infiltration. My sense is this noise is being generated by the ADX-S circuit, perhaps by a bad connection or an incorrect component value. I have attached several screen photos that show these noise harmonics in the waterfall display.?
I would appreciate your insight and suggestions on how to proceed with troubleshooting. Thanks. 73, Mark WB8BCU |
开云体育Mark,Try to shut down your monitor for a while and check the waterfall. Are your audio cables original length of about 0.5 meter? Sometimes if you mix these two cables, you will see no signal but lots of lines. Thanks, Adam 在 2023年12月20日，10:23，Mark Friedman <deepskytraveler@...> 写道：
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