[ntp:questions] Re: Please demistify the SHM driver
Piotr Trojanek
ptrojane at mion.elka.pw.edu.pl
Wed Sep 24 11:19:41 UTC 2003
In article <ea26a3f3.0309240143.50ec6d6c at posting.google.com>, Paul Croome wrote:
>Well... 4.625 is not a very good value for the jitter of a GPS refclock.
>My GPS (Motorola Oncore) is currently doing:
>
> remote refid st t when poll reach delay offset jitter
>==============================================================================
>*GPS_ONCORE(0) .GPS. 0 l 9 16 377 0.000 -0.069 0.004
>(...more stuff snipped)
Oncore driver use PPSapi, so jitter that you see in 'ntpq -p' is from
PPS signal. if you use only serial code from GPS receiver, don't expect
0.004 jitter.
--
Piotr Trojanek
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