Since I've duplicated this problem on two computers with two different rigs and two different audio chains (one USB and one VAC) this is fairly obvious a WSJT-X problem. Anything that adds noise to the bands is undesirable. Especially when it can be cured by a small software change. Mike W9MDB
On Sunday, February 14, 2021, 04:06:57 PM CST, Andy Durbin <a.dur...@msn.com> wrote: "Do you still see harmonics if you drop WSJT_X Pwr level to -0.4 or so?" I ran two tests with 2.4.0-rc1. One with Pwr at 0 dB and one with Pwr at about -1.4 dB. The 0 dB test was extra. All other versions were tested with approx -1.4 dB setting. (Why can't I read the setting by mousing over it? I have to change it to read it). There is no significant difference in the relative levels of fundamental and harmonics for the two different Pwr settings. In case it matters - Win 8.1 64 bit, TS-590S TX Moni feedback involves two passes through a PCM2903B which itself contributes some spurii. The PCM2903B spurii are fixed frequencies and are easily distinguished from the WSJT-X harmonics. With the exception of the change in characteristics at each tone change, I see no difference between the versions reported. I don't consider harmonics 40 dB below fundamental to a cause for concern. Audio clipping produces harmonics at much higher levels. Andy, k3wyc _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
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