Terje Mathisen wrote:
David Lord wrote:
When I get around to assembly of my 2-to-6 rs232 expander
I'll scope with both short and long cables and I've also
rs422 MC3486/7 to try.
I'm doubtful my modern scope can catch and display a 5 us
pulse with period of 1 sec.
That should not be too hard, even my 20-30 (?) year old Fluke ScopeMeter
123 handled the PPS signal on both Oncore and Garmin, as well as SURE.
If it will not do it, it will not do it! :-(
My DIY scope from around 1970 (-1.5kV and +4kV bare wiring
on my bench) would have done it.
Intention is to feed PPS and NMEA direct to each of my
pool.ntp.org servers and also servers on the lan.
Nice. :-)
I keep getting kicked off the pool rotation and it then
takes up to a day before the servers are being polled
again. An extra GPS source will keep the servers in sync
for that much longer so mostly the servers will still be
in sync when internet is back (BT upgrading the system).
I have two independent GPS sources at home, but still only a dyndns ipv4
address. IPv6 is OK of course (ntp[2|6].tmsw.no)
Terje
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