[ntp:questions] Thunderbolt at NTP ref clock.
david-taylor at blueyonder.co.uk.invalid
Thu Aug 1 06:25:06 UTC 2013
On 31/07/2013 20:36, DaveB wrote:
> The server is using 5 'net based servers at this time (my original GPS
> RX died) and is only just stable enough for what I'm doing. Sometimes
> due to asymetric ping times, it "wanders a bit" for an hour or three.
> Oh... Though the time server is FreeBSD based, other boxes in my empire
> are a mixture of Windows and Linux, various versions types and
> Cheers All.
> Dave. (G0WBX/G8KBV)
A small GPS with PPS I can recommend to you is this one:
At least here, on the top floor of a two-storey house in Scotland, it
gets enough signal to lock consistently. Not too expensive, and
available from a UK stockist.
A few hundred microseconds should be enough for your pulse, although
GPSs tend to use either 100 ms or 200 ms by default. Easier to see on a
non-storage 'scope as well! I'm pondering on making a driver and having
a terminated line running around the shack here (at pseudo RS-232
levels) for feeding PPS into all my PCs which have COM ports to get the
best time synchronisation. AT the moment, those PCs which aren't
stratum-1 have the poll interval set to 32 seconds to the local
I'm sure you know about the information on my site for FreeBSD, Windows
and Linux, but others may not:
More information about the questions