[ntp:questions] Re: Please demistify the SHM driver
jonathan at buzzard.org.uk
Wed Sep 24 21:52:31 UTC 2003
In article <bec993c8.0309240543.72c44459 at posting.google.com>,
shoppa at trailing-edge.com (Tim Shoppa) writes:
> Paul.Croome at softwareag.com (Paul Croome) wrote in message news:<ea26a3f3.0309240143.50ec6d6c at posting.google.com>...
>> 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
> Apples and Oranges. GPS_ONCORE is PPS, and he's using a serial-
> attached clock. 4.6ms of jitter isn't great for a serial-attached refclock,
> but it might be the best his clock does over the serial line.
You don't say, I manage better than 4.6ms of jitter with cheapo radio
clocks on the MSF and DCF77 signals.
Jonathan A. Buzzard Email: jonathan (at) buzzard.me.uk
Northumberland, United Kingdom. Tel: +44 1661-832195
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