[ntp:questions] problem with ntpd refclock and pps via parallel port

unruh unruh at wormhole.physics.ubc.ca
Mon Feb 1 15:07:34 UTC 2010


On 2010-01-31, David Lord <snews at lordynet.org> wrote:
>
> problem with ntpd refclock and  pps via parallel port
>
> Hi
>
> So does pps really need a refclock and/or does pps via
> parallel work ok or not on NetBSD-5?

Yes. Otherwise it has no idea what the seconds is. Ie, all pps does is
deliver a pulse at the exact second boundary, but that says nothing
about which second that is the boundary of. You need some other source
to give you the seconds.




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