On 7 Jul 2019 at 11:37, Edward stallman wrote: > I worked a new one JW7QIA Peter on 6m and was on the ON4KST 6m chat at > the time . When the QSO was complete I Thanked Peter and pasted his > final FT8 73 on the chat page . I don't understand the difference we > each posted in DT ? Peter posted my RR73 and the DT was 1.2 sec , I > posted his 73 and the DT was 0.1 sec . You know with 6m prop it could be > a Doppler shift from a Rock , who knows ? I tested my time using Time Is > and my clock was correct . any idea?
I worked JW7QIA earlier today (Sunday 7th) and I don't recall noticing any particular timing oddity before, during and after my QSO. I've just checked my ALL.TXT file and it shows that my transmissions had a DT of 0.0 (as one would expect!) and that none of the decoded transmissions from JW7QIA to me have a DT of >0.2. Also, a cursory scan in my ALL.TXT file of other decodes of JW7QIA's signal either side of my QSO time of 0912z doesn't show any excessive DT values, so it's bit puzzling as to where his figure of 1.2secs for your signal might have come from unless, as Bill says, it's because of some significant latency through his receiving setup. For what it's worth, my 'radio' PC's clock is disciplined using the Meinberg NTP client, using my local Raspberry Pi-based, GPS-locked stratum 1 NTP server so I'm confident that my timing is always pretty accurate - my offset from 'real' time doesn't usually exceed 1-2msecs. --- Martin, G0HDB --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
