[ntp:questions] Re: NTP precision
damz
damz at mgix.net
Sun Sep 25 11:22:03 UTC 2005
Brad Knowles wrote:
> At 7:40 AM +0000 2005-09-24, David J Taylor wrote:
>
>> jitter
>> The estimated time error of the system clock measured as an
>> exponential average of RMS time differences. (Jitter errors are
>> caused by
>> short-term variations in frequency with components greater than 10Hz).
Does the "components greater than 10Hz" means that the RMS part of the
jitter is calculated on a 100ms (= 1/10 Hz) time frame?
So: the jitter on a period would be the exponential average (over the
current period) of the RMS of time differences in a 100ms time frame?
Is this measured or evaluated?
-- damz
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