Hi, It’s possibly on the way out. I don’t have an 18x but can get badformat showing if I pull the antenna on a NMEA source. Another possibility, it could be that you have a GPS jammer in the vicinity. If you run your cv command in a loopover a day you may see some pattern in the badformat counts. Mike
> Le 7 août 2019 à 02:37, Brandon Applegate <bran...@burn.net> a écrit : > > Hello all, > > First of all - I know my question technically isn’t about ntp software per > se. But I figured this is probably the best audience that might know what’s > going on. > > I have a Garmin 18x LVC connected via serial to a Linux box. It has been > rock solid for years (I think I got it in 2012 ?). I have all the usual > tweaks for low_latency, recommended ntp.conf fudge values, flags, etc. I’ve > also used the SNSRCFG Windows software to update the firmware as well as make > tweaks (i.e. minimum GPS sentence output). It has been very accurate for > years (i.e. in the single digit microseconds, typically close to 0). > > In the past couple of weeks (maybe, regretfully I don’t have my graphing > running at the moment…) it seems to have crept up into the 20s. > > remote refid st t when poll reach delay offset jitter > ============================================================================== > o127.127.20.0 .GPS. 0 l 3 16 377 0.000 -0.025 0.005 > > One thing I notice is that the badformat counter for clockvar is also > increasing, whereas I don’t think it really ever increased before: > > vom@ice:~$ ntpq -c cv | grep badformat > poll=1508, noreply=1, badformat=865, baddata=0, fudgetime2=600.000, > > I haven’t made any software or config changes. The GPS puck hasn’t been > moved. I’ve rebooted the server as well as power cycled the puck. I’m not > quite sure what else I can look at. > > Could it be my 18x is “dying a slow death” ? Has anyone ever seen this > behavior or have any advice ? > > Thanks in advance. > > -- > Brandon Applegate - CCIE 10273 > PGP Key fingerprint: > 0641 D285 A36F 533A 73E5 2541 4920 533C C616 703A > "For thousands of years men dreamed of pacts with demons. > Only now are such things possible." > > _______________________________________________ > questions mailing list > questions@lists.ntp.org > http://lists.ntp.org/listinfo/questions "Ceux qui sont prêts à abandonner une liberté essentielle pour obtenir une petite et provisoire sécurité, ne méritent ni liberté ni sécurité." Benjimin Franklin _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
