Hi Charlie. From the WSJT-X users guide: “2. If Doppler shift is less than 750 Hz you may set Doppler tracking to None and not use any CAT control for frequency settings. In this case, all necessary Doppler tracking will be done by shifting the audio spectra.” I am positive that when this feature was first introduced it worked that way. Something has been lost since then.. 73, Russ – K2TXB From: Charles Suckling <g3w...@gmail.com> Sent: Wednesday, January 1, 2025 2:17 PM To: k2...@comcast.net; WSJT software development <wsjt-devel@lists.sourceforge.net> Subject: Re: [wsjt-devel] Echo mode not working right in RC7 Hi Russ Echo mode now always transmits a 1500Hz tone. With Doppler set to None, the echo is shifted at audio. You see tone on waterfall but not at 1500 unless your self Doppler is 0. More here: https://drive.google.com/file/d/1SWQUYuZqlvlYow2Kc-OapMRaOc5b-h_n/view?usp=sharing 73 Charlie On Wed, 1 Jan 2025 at 19:41, k2txb--- via wsjt-devel <wsjt-devel@lists.sourceforge.net <mailto:wsjt-devel@lists.sourceforge.net> > wrote: Hi all. It seems that in echo mode, WSJT-X is no longer adjusting the TX tone to compensate for doppler shift. To test this, I set up on 2 meter EME, with Doppler Tracking enabled but track mode set to none. While running echo mode I also observe the frequency of the returned echo on the WSJT-X waterfall. This morning doppler shift was at +120 Hz, and the returned echo was displayed at 1620 Hz. If TX frequency was being shifted, the echo should appear at 1500 Hz.
I am quite sure that this worked properly in earlier versions. 73, Russ - K2TXB PS: After writing the above I realized that I had ignored a much easier test. I turned on another receiver and monotored the tone from the EME rig. It always sends at 1500 Hz in echo mode, no matter if Doppler Tracking is enabled or not.. _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net <mailto: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
