[ntp:questions] Re: why difference about 200ms with time.nist.gov

David J Taylor david-taylor at blueyonder.co.not-this-bit.nor-this-part.uk
Wed Mar 29 08:03:38 UTC 2006

flyfatpig at gmail.com wrote:
> I built a time server with redhat 7.2 and ntp 4.2.0 and Motorola M12T.
> The time server works well.But when I  sync with time.nist.gov ,I
> found my time server is about 200ms later .who can tell me why?

Are you syncing with the correct edge of the pulse?  It sounds like you 
are syncing to the trailing edge and not the leading edge of the pulse. 
You may be able to change the edge in your NTP configuration.


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