Hi Jos All understood. We will be very interested to hear about your findings.
I will play some more with my IC735 and the CRTL key. One thing to note - with the SDR programs I have tested with, changing the frequency of the SDR does cause WSJT-X to move to the SDR frequency, as far as I recall (and vice-versa of course). 73 Charlie On Sat, 28 Sept 2024 at 12:13, Jos F.M. VanderList via wsjt-devel < wsjt-devel@lists.sourceforge.net> wrote: > Good morning Charlie, > Yes, the logfile that I sent to Mike covered a large part of the day > including the moment that the sked frequency started to drift away. > I like your idea to test with another radio. Of course I don't have a > second homemade transceiver for 144 MHz with CAT-control, so maybe your > idea of using an SDR is worth investigating. > Still, if such a test shows that my station setup is unique, then the > question remains what CAT-commands or sequence of events and CAT-commands > can lead to WSJT-X changing the sked frequency. I have even considered to > program a PIC processor to behave as an ideal transceiver to test if the > same behavior occurs. > I have a puzzle to solve and will inform you of what I find. Thanks again > for helping me! > 73, Jos, PA0JOZ > > On Sat, 28 Sept 2024 at 07:07, Charles Suckling via wsjt-devel < > wsjt-devel@lists.sourceforge.net> wrote: > >> Hi Jos >> >> It does appear your situation is unique. As far as I'm aware, the rig >> control software within WSJT-X itself has not changed for years, and this >> problem has never been reported before. As I mentioned yesterday, WSJT-X >> has been used for EME on 24GHz where Doppler shifts often exceed 19kHz. It >> has also been used successfully on 47GHz, so I'm confident that the issue >> is not related to the magnitude of the Doppler shift. >> >> I wonder if you have some other radio you could test with? This could be >> for example an SDR controlled by software such as HDSDR or SDR Console. >> Both of these programs can be connected to WSJT-X, since they both have >> emulators (using a virtual com port connection such as com0com). Audio can >> be routed via virtual audio cables, >> >> Did the data that Mike studied cover the case during which the sked >> frequency was changing? >> >> 73 >> >> Charlie >> >> On Fri, 27 Sept 2024 at 16:50, Jos F.M. VanderList via wsjt-devel < >> wsjt-devel@lists.sourceforge.net> wrote: >> >>> Good afternoon all, >>> While monitoring the DL0SHF beacon at 10 GHz I noticed strange behavior >>> of the Doppler tracking. >>> I set the sked frequency initially to 10368.024 MHz, with Doppler >>> tracking "On DX Echo". >>> DL0SHF appears initially at its normal place in the waterfall. >>> However, when the (absolute) value of the DX Doppler exceeds >>> approximately 19 kHz the sked frequency gets changed in the Astro window, >>> without me touching anything. The change is steadily downward with 1 or 2 >>> Hz at a time. At the same time the VFO frequency of the transceiver is also >>> ordered to a lower frequency. And the result is that the beacon is drifting >>> slowly upwards in the waterfall. >>> I also noticed that in the situation that WSJT-X alters the sked >>> frequency it is sometimes possible to adjust the sked frequency by turning >>> the tuning knob of the transceiver, without pressing CTRL. >>> Mike, W9MDB, checked the communication between WSJT-X and the >>> transceiver and he didn't find anything strange there. So to me it seems >>> that the problem is in WSJT-X itself. >>> Before anyone asks: all my oscillators are locked to my 10 MHz GPSDO. >>> And the transceiver frequency follows the frequency ordered by WSJT-X. >>> I'll give some examples from this afternoon. Sked frequency is the sked >>> frequency in the Astro window. Transceiver frequency is the frequency as >>> shown below the Monitor button in the main WSJT-X window. And DXDop is as >>> shown in the Astro window. >>> DXDop: TRX freq.: Sked freq.: >>> -17000 10368.007000 10368.024000 >>> -18000 10368.006000 10368.024000 >>> -19116 10368.004877 10368.023993 >>> -19500 10368.004232 10368.023932 >>> -19999 10368.003480 10368.023479 >>> -20497 10368.002335 10368.022832 >>> Can anyone shed some light on this? Why is WSJT-X altering the sked >>> frequency if the Doppler is more than 19 kHz? And why isn't the Doppler >>> tracking keeping the beacon stable in the waterfall? Is it a bug, am I >>> doing something wrong, is my understanding of the Doppler tracking wrong? >>> 73, Jos, PA0JOZ >>> _______________________________________________ >>> 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 >> > _______________________________________________ > 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
