I've got a Garmin GPS 18 LVD attached to a serial port on a FreeBSD 6.2 box. I've been trying to enable PPS support for ntpd on the BSD box, but this is all I get as a result:

20 Feb 10:41:46 ntpd[14503]: refclock_nmea: time_pps_kcbind failed: Operation not supported

I do have pps.ko and ppbus.ko kernel modules loaded according to kldstat.

My ntpd.conf looks like:

  # Garmin GPS 18 LVD (OEM) reference clock:
  server mode 1 minpoll 4
  fudge time1 0.000 flag2 0 flag3 1 refid PPS

The GPS 18 is configured to enable PPS (set to a 200ms pulse width) and it's wired to DCD on the serial port.

Any ideas?  I'm an NTP GPS refclock newbie...

Aaron out.
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