[ntp:questions] PPS without a peer

Tim Shoppa shoppa at trailing-edge.com
Mon Aug 18 17:50:05 UTC 2003


Jeff Mock <jeff-ml at mock.com> wrote in message news:<mailman.0.1059449432.1777.questions at ntp.org>...
> I am working on an application using NTP where a  machine sits in
> an environment without access to the Internet (cable TV head end).
> The machine does not need to be synchronized to absolute time, but
> it does need to be synchronized an external PPS source so that the 
> passing of time happens at the precision of the PPS source.
> 
> [...]
>
> So, I'm looking for some help.  Maybe some clever configuration wisdom
> or maybe some insight on how to hack ntpd so that it will lock up to
> a PPS source without requiring a peer.

Can't you use "ppsctl" (comes with PPSkit) to turn on kernel PPS
independently of ntpd running?  I think I did this with ppsctl -tah
(-ta means that assert edge is the second mark, the h means to enable
PPS in the kernel).

Tim.



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