> I have problem with my stratum1 box. My box include: freebsd >5.2-RELEASE without PPS , ntp-4.2.0_1, Intel Pentium III, 40 G IDE, >Germin GPSmap60 , connect with serial com. In GPSmap60 set as NMEA. >Freebsd box can get NMEA input string. My configuration of ntp.conf >like this: > >server 127.127.20.0 mode 1 prefer minpoll 4 >server 127.127.1.0 minpoll 5
Most NMEA devices (or at least all the ones I've worked with) send their text with a significant offset. You can correct that with fudge 27.127.20.0 time1 xxxx where xxxx is the offset to add in seconds. I forget the sign. You can work it out by trial and error. > remote refid st t when poll reach delay offset jitter >============================================================================== >*GPS_NMEA(0) .GPS. 0 l - 16 3 0.000 -7.127 7.982 > LOCAL(0) 73.78.73.84 5 l 22 32 1 0.000 0.000 0.002 > time.symmetrico .GPS. 1 u 21 64 1 248.084 167.016 0.002 > time.nist.gov .ACTS. 1 u 20 64 1 273.165 156.541 0.002 > andromeda.cs.pu .CDMA. 1 u 19 64 1 295.742 157.582 0.002 > 203.185.69.60 .PPS. 1 u 18 64 1 270.912 292.165 0.002 > 122.154.11.67 .INIT. 16 u - 64 0 0.000 0.000 4000.00 It looks like you are off about 160 ms. What I would do is use the "noselect" option on the server command on your NMEA line, and adjust the time1 fudge factor until it looks good. (Then turn off noselect.) If you like collecting data and makeing graphs, look into the statistics options. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
