Venu Gopal wrote: > David J Taylor wrote: >> Venu Gopal wrote: >>> I have a couple of similar experiences ! >>> I observed that the NMEA sentences are not generated in sync with >>> PPS. Theres lot of jitter in these sentences resulting in 1 second >>> offsets. Its fine if the jitter is within few milliseconds. But >>> sometimes it exceeds a second and thats really painful. >>> >>> This observation was discussed earlier and the solution is to go for >>> a better GPS receiver! >> >> Use the shortest GPS sentences, and the highest baud rate, to keep >> the total message time as short as possible. >> > The issue is not with the length of the messages and the baud rate. > > Venu
Well, I found that if you had a bad configuration (sentences too long or baud rate too low), the sentences could exceed one second, and therefore be useless for NTP. However, I have not made any measurements showing jitter versus sentence length, so I would appreciate any pointers to measurements you have made or know about. Cheers, David _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
