David Duchscher said: >Soekris ... NTP ... GPS >Any comments, suggestions, pointers, etc would be greatly appreciated.
In my experience with a 4801, the Linux kernel (2.4.mumble or 2.6.mumble, I don't recall which exactly) was unable to tame the 4801's clock. FreeBSD 5.3, on the other hand, worked. I've run the 4801 with a Garmin GPS-18LVC. It spent quite a while sitting on a fibreglass batt with the case cover removed in a ventilated, unheated, attic crawl-space. See http://www.kostecke.net/ntp/index.html?date=20070101 for a typical plot (for January 1st, 2007 in the attic). The peer summary for that period was: ident cnt mean rms max delay dist disp ===================================================== GPS_NMEA(0) 5235 0.002 0.002 0.013 0.000 0.270 0.248 I've also used the same 4801 as a CHU receiver via a MiniPCI audio card. The performance is no where near as good as with the GPS. A example of a good plot is: http://www.kostecke.net/ntp/index.html?date=20070620 -- Steve Kostecke <[EMAIL PROTECTED]> NTP Public Services Project http://support.ntp.org/ Public Key at http://support.ntp.org/Users/SteveKostecke _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
