Hello Wolfgang, For a recently downloaded, version 5.31.331.0 Copyright 1996 to 2003, run on Window 7,
on the advanced setting, there are two radio buttons, to use a single server or "Automatically pick a new server for each sync". On my machine, sometime it reports, at bottom of screen in grey color, that it fails to sync on first trail and auto retry successfully in 1 second later. 73 Simon VR2UKQ On 12/6/18, Wolfgang <oe1...@gmail.com> wrote: > Hello Simon, > > Thursday, December 6, 2018, 3:38:45 PM, you wrote: > >> The Dimension 4 i download recently uses, in dafault list, dozens >> of ntp server, one after the next. > > this is exactly the point: D4 lists many server, but for time sync it > is using just one of them. And this can be a problem - not in all > cases, but in some. > > Wikipedia in "Clock synchronization algorithm" says: > > "Accurate synchronization is achieved when both the incoming and outgoing > routes between the client and the server have symmetrical nominal delay. > If the routes do not have a common nominal delay, there will be a > systematic bias of half the difference between the forward and backward > travel times." > > Additional in this Wiki, in "Windows Time service": > > "If higher accuracy is desired, Microsoft recommends using a different > NTP implementation." > > https://en.wikipedia.org/wiki/Network_Time_Protocol > > > Average Windows user, if they care (and who does that) looking for +/- > 1 min, or so. For JT protocol, we are aiming to a have +/- 0,1 second. > > 73 de Wolfgang > OE1MWW > > ---------- > Amateur radio is the most expensive type of free-of-charge communication! > Amateurfunk ist die teuerste Art der kostenlosen Kommunikation! > > > > _______________________________________________ > 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
