If you turn down the gain so it looks "cleaner" then you won't see it when it's weak. So what if it looks a little noisy? That's what the FFT actually looks like since it's doing a hard shift between frequencies.
Mike W9MDB On Tuesday, July 23, 2024 at 11:34:00 AM CDT, Andy Durbin via wsjt-devel <wsjt-devel@lists.sourceforge.net> wrote: "Turn your waterfall gain down (top left slider) and it will clean it up mostly. I have a +20 dB SNR file and it is awful looking until you turn the gain of the waterfall down." Thanks for the tip. I have viewed many much stronger signals using the same waterfall setting and have not seen similar signal artifacts. Also, I observed no direct correlation between reported S/N and the level of the signal artifacts. I'm not convinced waterfall gain is implicated. I looked at the 180000 file using Audacity spectrum analysis. I did not see the clear discrete frequencies that I was expecting but I have not compared with a clean SF signal yet. The artifacts may, as previously suggested, been due to a propagation anomaly. However, I still suspect the artifacts were in the transmitted signal. Only K8R operators would know if there were any changes that could account for the differences. I have made three screen captures, and all the audio files for this receiving session, available on dropbox at https://tinyurl.com/bdeeexez I am not asking for any developer involvement as the signals decoded normally. I'm only posting the data as a few have expressed interest. 73, Andy, k3wyc _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
