[ntp:questions] NTP.conf using Dave Hart code.
bkreiger at sigmatechcorp.com
Tue Feb 9 13:53:01 UTC 2010
I am attempting to setup a new time server using GPS synchronized time
on a Windows XP SP3 box. I started by installing the Meinburg NTP
package, which I then updated with Dave Hart's NTP code, and then I
put Dave Harts PPS dll on. It appears to be working, however I wanted
some input to verify that my NTP.conf file is correct.
Here are my objectives:
1) The GPS and PPS signals are coming in on COM1, this seems to be
2) I ALWAYS want to serve out time, even if it has to be the PC Clock.
3) I want the priority of syncing NTP to be:
1 - PPS synchronized
2 - GPS synchronized
3 - PC Clock.
Does the following NTP.conf do this correctly? One questions is if the
prefer should be on the PPS or GPS line.
# NTP Network Time Protocol
# **** ATTENTION ****: *You have to restart the NTP service when you
change this file to activate the changes*
# PLEASE CHECK THIS FILE CAREFULLY AND MODIFY IT IF REQUIRED
# Configuration File created by Windows Binary Distribution Installer
Rev.: 1.26 mbg
# please check http://www.ntp.org for additional documentation and
# Use drift file
driftfile "C:\Program Files\NTP\etc\ntp.drift"
# your local system clock, could be used as a backup
# (this is only useful if you need to distribute time no matter how
good or bad it is)
# but it should operate at a high stratum level to let the clients
know and force them to
# use any other timesource they may have.
fudge 127.127.1.0 stratum 5
pps 127.127.22.1 stratum 1
gps 127.127.20.1 stratum 2
server 127.127.22.1 minpoll 4 # Atom - serialpps.sys
server 127.127.20.1 minpoll 4 prefer # NMEA serial port
# Statistics collection
statsdir "C:\Program Files\NTP\etc\"
Thanks for your help.
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