On 2010-07-16, Matuschka, Sebastian <[email protected]> wrote: > >>I think you mean that you have a 1PPS source that is synchronized to >>DCF-77 but does not send the actual received DCF-77 signal. >>In that case it should be OK to use it to increment a clock. > > No, it really is a DCF-77 signal.
Uh, why don't you tell us exactly what you have. Why in the world would any local source be using a DCF77 signal? > >>However, when you have expectations that you can control what source >>is used to sync your clock, and how quickly that switches, you cannot >>use ntpd. It does not offer that control. > > I don't want to control what source is used, just how fast it is switched > when the signal is lost. > minpoll and maxpoll seem to control that, and i guess i just need smaller > maxpoll than the one that is allowed. And exactly how would it know that the signal is lost and not just temproarily missing. Is one dropped packet enough?(that would be a disaster for any real DCF77 source). > > I have set minpoll to 4 and maxpoll to 5. After the signal is lost it takes 3 > to 4 minutes to switch to another source. So? > Why does it take so long when maxpoll is 5 (32 seconds)? How many times must > a poll fail until the source is expected to be unrecoverrable for now? Because it waits a while to see if the loss is temporary. Probably 8 times. > > Best Regards > Sebastian _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
