[ntp:questions] -8.625 ms offset between ref clock (NMEA PPS) and nearest stratum 1 peer

David Woolley david at ex.djwhome.demon.invalid
Sat Nov 13 16:57:32 UTC 2010


Edward T. Mischanko wrote:
> I am running a Garmin 18x LVC with PPS enabled; it is very stable and I 
> beleave it to be accurate.  My nearest back-up server is consistantly 
> around -8.625ms away.  This is so much that other clients on my network see 

You may be sensing the wrong edge of the pulse.

> me as a false ticker even with a prefer setting.  I am on a farly fast ADSL 
> connection to the internet, but of course, it is non-symetrical.  Other 
> users I have conversed with don't seem to have this wide of an offset, so 
> something is wrong somewhere.  Yes, I can fudge the offset away on the ref 
> clock, but it doesn't seem right to tell a ref clock to lie about what time 
> it is just to keep
> everyone else happy? 
> 
> 




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