If enough users start "nudging" their time one way or the other, the whole reason for external time sync is defeated. It will chasing your tail from the get go. Just sync periodically and forget those that don't/can't. It's not worth the problems it will cause to the normal users that do it right.
On Tue, May 14, 2019 at 4:42 PM Derek Turner via wsjt-devel < wsjt-devel@lists.sourceforge.net> wrote: > I was thinking about adding a feature to my FT8/4 Assistant program to > display in a histogram the delta times from the last minute's worth of > decodes and maybe eventually to enable the user to nudge the PC clock > backwards or forwards by a few milliseconds. > > This may or may not be a good idea but my problem is that so far I have > not been able to convert the UDP decode message time offset back to > anything resembling the DT column in the WSJT-X Band Activity window and I > would very much appreciate some help. > > In the specification the Delta Time is described as a float serialised as > a Double. When I examine the eight bytes following the SNR bytes I see a > consistent correlation between the Band Activity DT and the pattern of > bytes. > > So I know I am looking in the right place, which is the eight bytes > starting at (zero base) byte 32 . Here is a screen shot from an Excel > worksheet where I compare samples of the Band Activity DT with their Decode > byte array bytes:- > > [image: Inline image] > > I have several issues here that I do not understand :- > > 1. The pattern of bytes for negative and positive Delta Times are > identical so the sign is lost. > 2. Between SNR and Delta Frequency there are nine bytes, not the eight I > expected for a Double. Byte 40 appears to be surplus. > 3. DT 0 is suspiciously all zeros when DT 0.1 seems to be a very large > number. > 4. Bytes 33 and 34 are identical. > > Please can somebody make sense of this for me. > > 73 de G4SWY Derek +++ > > > > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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