On 26/10/07 21:23, Chuck wrote: > hmm... this is what i have so far from messing around. this keeps the offset > for the gps clock in reasonable range or else it is skewed off by 230ms or so > and there is always an X by it. i suppose it doesnt matter since the pulse > (gps1) is always * and is usually within 100 us at worst, 5us at best. > > there seems to be a considerable change from poll to poll. it never settles > down into a nice small range hardly varying as i expected it to do. > > server 127.127.28.0 minpoll 4 maxpoll 4 > fudge 127.127.28.0 time1 -0.200 refid GPS > > server 127.127.28.1 minpoll 4 maxpoll 4 prefer > fudge 127.127.28.1 refid GPS1
Only the PPS signal is timed to the start of the second. The NMEA data is not. When there's no fix the PPS signal will be (relatively) ok, but the time output can be out of sync. Either combine the NMEA output with the PPS signal or only use PPS. -- Simon Arlott
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