[ntp:questions] Re: HowTo calibrate system clock frequency using NTP

David L. Mills mills at udel.edu
Fri Feb 3 14:28:46 UTC 2006


Your question does not parse. The frequency correction has nothing to do 
with the state variables you quote. The time the frequency correction is 
monitored is prominently displayed on the ntpq rv billboard.


Daniel Kabs wrote:
> David L. Mills wrote:
>> Yes the sign reverses when measuring from the local or the remote 
>> machine. 
> Sorry, all my fault. My question "why is this?" was just too vague. :-)
> I was not asking about the sign reversal but about the differing results 
> (23.17 s/day vs. 23.87 s/day).
>> However, your message compared one measurement with another very 
>> similar magnitude but sign reversed. Go figure.
> Comparing results from Plan A vs. Plan B, I currently fail to figure why 
> there is this difference.
> Maybe it has to do with acquiring the offset for Plan B. I read the 
> "offset" variable using
>   ntpq -c 'rv <assoc_id_of_peer>'
> but which variable reflects the time when this offset was measured: Is 
> is the value "reftime", "org", "rec" or "xmt"?
> Cheers
> Daniel

More information about the questions mailing list