hmm, timeX is just a calibration factor so I don't think adding it will fix my pps breakage. But, I do think it's important and I'm not using it.
So, question to you, I have a U-Blox NEO-6P module. How would I go about determining the time1/time2 values for the 127.127.20.0 server? The key words "offset" and "calibration" don't show up here http://www.u-blox.com/images/downloads/Product_Docs/NEO-6_DataSheet_%28GPS.G6-HW-09005%29.pdf On Sat, Jun 15, 2013 at 8:54 AM, David Lord <[email protected]> wrote: > Richard Cagley wrote: > >> I have a TI DM8168 processor and a u-blox gps. >> >> If I enable an internet server and pps, then pps works great >> >> server clock.redhat.com iburst prefer minpoll 4 maxpoll 4 >> server 127.127.22.0 minpoll 4 maxpoll 4 >> fudge 127.127.22.0 flag3 1 >> >> However, if I add an NMEA server to my ntp.conf file like this >> >> server 127.127.20.0 mode 1 >> fudge 127.127.20.0 flag1 1 >> server 127.127.22.0 minpoll 4 maxpoll 4 >> fudge 127.127.22.0 flag3 1 >> >> then pps stops working. I can kill ntpd and ppstest no longer works. It's >> as though nmea is clobbering the serial port. >> >> It sorta feels like this, but there was no resolution >> http://lists.ntp.org/**pipermail/questions/2011-**September/030347.html<http://lists.ntp.org/pipermail/questions/2011-September/030347.html> >> >> Can anyone help me. I've really been struggling with this. >> > > I'm using NetBSD-6.1 ntpd 4.2.6p5 but have also had pps + nmea > working on ubuntu. > > You probably need to determine then add time2 0.xyz sec to > your config. The time2 value is for your particular gps and > gps firmware version. > > For my "Sure" gps I have: > > server 127.127.20.2 mode 18 prefer > fudge 127.127.20.2 stratum 4 time2 0.417 flag1 0 refid GPSb > server 127.127.22.2 > fudge 127.127.22.2 flag2 0 flag3 1 refid PPSb > > From peer summary I have: > 127.127.22.2 mean=0.000 rms=0.004 max=0.038 > > The 0.038 is mostly due to load from two cron jobs each evening. > > > David > > ______________________________**_________________ > questions mailing list > [email protected] > http://lists.ntp.org/listinfo/**questions<http://lists.ntp.org/listinfo/questions> > _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
