On 2011-10-17, Miguel Gon?alves <m...@miguelgoncalves.com> wrote: > On 17 October 2011 17:37, unruh <un...@physics.ubc.ca> wrote: >> On 2011-10-17, Miguel Gon?alves <m...@miguelgoncalves.com> wrote: >>> Excluding the Garmins and Sure Evaluation Boards which both have PPS >>> outputs what are the best (meaning well supported) refclocks today to >>> set up a new server? >> >> Perhaps you should tell us what your requirements are? You dismiss two >> very valid possibilities for no stated reason. Tell us what you need and >> you might bet helpful comments. > > 1 us accuracy like the Garmin or Sure is good enough. It's to be used > in local clock synchronization with NTP. I am achieving < 10 us with > NTP in our LAN on certain machines. > > The reason is that I already have one of each and want a different > third clock. Nothing against Garmin or Sure. In fact, I highly
How different? Do you want it depending on the same thing-- gps? Or do you wnat it to have a different time base (eg an atomic clock which may be slaved to gps, but has a different take on it). How much money? As people say, the Oncore gps is another highly regarded gps only solution, and not that expensive (More than Sure or Garmin I believe once everything-- power supply, antenna, etc. is counted in) > recommend both. Our Garmin based NTP server is in our DMZ serving the > NTP Pool Project: > > $ ntpq -p 1.pt.pool.ntp.org > remote refid st t when poll reach delay offset jitter >============================================================================== > *GPS_NMEA(0) .GPSg. 0 l 7 16 377 0.000 6.132 6.592 > oPPS(0) .PPSg. 0 l 6 16 377 0.000 0.004 0.004 > +ntp-p1.obspm.fr .TS-3. 1 u 61 64 377 45.184 1.124 1.177 > +ptbtime1.ptb.de .DCFa. 1 u 9 64 377 67.106 1.281 1.668 > +ntp1.oma.be .PPS. 1 u 6 64 377 56.116 5.272 0.684 > +canon.inria.fr .GPSi. 1 u 31 64 377 44.312 1.096 1.016 > +ntp1.nl.uu.net .PPS. 1 u 5 64 377 58.679 3.958 0.624 > +ntp1.as34288.ne .PPS. 1 u 34 64 377 65.763 2.384 1.939 > -smtp.certum.pl .GPS. 1 u 19 64 377 85.549 -1.574 1.733 > > It's the only stratum 1 in this country. :-) > > Cheers, > Miguel _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
