On Jun 21, 5:14 pm, "Richard B. Gilbert" <[EMAIL PROTECTED]> wrote: > Rejean wrote: > > I'm trying to use NTP 4.2.0 with red hat 7.3 and a military GPS on a > > Pentium 1.4 Ghz board. > > > If I compare the Linux Time with the GPS time using a oscilloscope. > > At start time I was getting a time difference of about 20ms then after > > 6h linux time was 150ms ahead. > > Can i expect to have a time precision to +/-20ms whithout the PPS. > > There's no way we can answer that without knowing more about the GPS and > how time is being transmitted to the Linux system!
The GPS is connected through the serial port at 9600 bps And the ntp.conf is setup to read it. > > WITH the PPS, you should have time good to within 50 nanoseconds or > better! Just how good it will be depends very much on how the interrupt > system works. If it's low latency, time will be very good. If not, not! _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
