EndRun Tempus LX GPS, User Manual

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T e m p u s L X G P S U s e r M a n u a l 26
C H A P T E R F O U R
27 T e m p u s L X G P S U s e r M a n u a l
S E T T I N G U P N T P C L I E N T S O N W I N D O W S N T 4 . 0 / 2 0 0 0 / X P
Basic NTP Client Setup
Basic setup is relatively simple, if:
• You have been able to successfully communicate with the Tempus LX on your network.
• You have installed NTP on your client computer.
Configure NTP
You must edit the ntp.conf file which
ntpd.exe
, the NTP daemon, looks for by default in the the
\winnt\system32\drivers\etc
directory of the boot partition. If your NTP installation placed this file in
a different place, you must find it and edit it. For example, XP uses \windows\system32\drivers\etc .
Add this line to the
ntp.conf
file:
server 192.168.1.245
This line tells
ntpd.exe
to use the NTP server at address 192.168.1.245 in addition to any other
servers which might also be configured in the ntp.conf file.
Re-start
ntpd.exe
to have it begin using the Tempus LX server. By default, the NTP installation
program installs
ntpd.exe
as a service called Network Time Protocol, and starts it. You must use
the Services utility in Control Panel to stop the Network Time Protocol service and then re-start it.
Use the NTP utility
ntpq.exe
to check that
ntpd.exe
is able to communicate with the Tempus LX.
By default it is installed in the
\Program Files\Network Time Protocol
sub-directory of your Windows
NT/2000/XP partition. From a console window, after issuing the command
ntpq
you will see the
ntpq.exe
command prompt:
ntpq>
Use the command
peers
to display the NTP peers which your computer is using. One of them should be the Tempus LX
server which you have just configured. You should verify that it is being ‘reached’. (You may have
to continue issuing the peers command for a minute or two before you will see the ‘reach’ count
increment.) If you have other peers configured, verify that the offset information for the Tempus LX
server peer and your other peers is in agreement to within a few milliseconds, assuming that the other
peers are synchronized to that level of accuracy.
It may also be useful to start the NTP daemon in ‘debug’ mode (
ntpd -d
) to confirm successful con-
figuration. The debug version of the NTP daemon is located in the
debug
sub-directory of your NTP
directory. Refer to the NTP documentation for detailed usage of these debug utilities.