Chaofu Chen wrote:
To David: The PPS is feed in from pin 1 (DCD) of /dev/cuad1. As I've said, NTP works fine now, after changing "ident" value in PPSGENERIC and recompiling and installing the new kernel. Performance of type 20 driver is good enough for me, thanks for your advice. Maybe I will try that someday.
Probably on FreeBSD you have a more recent version of ntpd and that would be no better with type 22 driver. Problem I had was the offset without PPS corresponds to that derived from NMEA which is 100s of ms out which is then too far for PPS to kick in. I'm pretty sure this was a known problem that's been fixed in more recent ntpd. My solution using a large fudge time1 for NMEA driver along with type 22 driver seems more stable than with just type 20 driver where I've lost PPS after a couple of days and had offset shoot up from a few us to 100s of ms with PPS failing to kick back in. David _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions