[ntp:questions] PPS versus serial offset
detha at foad.co.za
Wed Aug 28 13:24:51 UTC 2013
On Wed, 28 Aug 2013 12:19:38 +0000, Steve Kostecke wrote:
> On 2013-08-28, David Taylor <david-taylor at blueyonder.co.uk> wrote:
>> detha <detha at foad.co.za> wrote:
>> I would be more worried about the 11 ms step in the PPS at about -155
> The PPS signal is plotted in green and does not diverge visibly from 0.
> The blue line, which displays the 11ms jump, is labled "stratum 1". It is
> very likely the system offset.
It is a nearby (~15ms) server that also happens to have a GPS -
normally quite reliable but something apparently upset it for a bit. The
PPS here pretends to stay within +/- 15us
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