[ntp:questions] NTP on local networks
david-taylor at blueyonder.co.uk.invalid
Wed Aug 1 10:05:06 UTC 2012
On 01/08/2012 10:15, Terje Mathisen wrote:
> This summer I received two more SURE boards, it took about an hour total
> to solder on the two required patch wires on each of them.
> (I used David's pictures to remind me where to put the patch wires!)
> Together with a pair of old laptops (with proper serial ports) this
> gives me another set of Stratum1 servers, for a total outlay of less
> than $100.
> I've seen reports here that one of the timing nuts have measured the
> SURE board as giving a PPS signal that's in the 25-50 ns range?
> According to the loopstats files my laptop is mostly in the 3-500 ns
> range, with excursions up to a us or two, obviously due to interrupt
> response time jitter and temperature variations.
Tom Van Baak's page reports RMS error of 22 nanoseconds.
and is well worth reading in any case!
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