M e r i d i a n I I U s e r M a n u a l
76
C H A P T E R S E V E N
77
M e r i d i a n I I U s e r M a n u a l
N E T W O R K T I M E P R O T O C O L ( N T P )
*******************************************************************************
*******************************************************************************
* *
* The Meridian II GPS Network Time Protocol configuration has been updated. *
* *
* Please re-boot now for the changes to take effect. *
* *
*******************************************************************************
*******************************************************************************
*******************************************************************************
Configuring the Meridian II as a Stratum 2 Server
Operating Meridian II as a Stratum 1 Server is the recommended mode. However, there are times
when Stratum 2 operation is a good strategy:
1. When you want a backup source of time. In this case, Meridian II will operate as a Stratum 1
Server as long as it is locked to the GPS signal. If it loses the signal, then Meridian II will start to
drift away from “perfect” time. Eventually, when it has drifted 10 milliseconds, it reach the unlocked
condition and stop serving time on your network. If you have Meridian II configured for Stratum 2
operation, then it will continue serving time, using another Time Server as its reference. If Meridian
II is later able to acquire lock on the GPS signal again, it will switch back to Stratum 1 operation.
2. When you want your Meridian II to serve accurate time, but you don’t want to use the antenna
(for some reason). In this case, Meridian II can operate solely as a Stratum 2 server, with no antenna
connected.
Since there are innumerable ways to configure your network with Stratum 2 servers, specific insruc-
tions for how to do that are beyond the scope of this manual. General instructions on how to edit the
ntp.conf
file are below.
Edit ntp.conf File
You must edit the ntp.conf file in order to point your Stratum 2 server at a Stratum 1 server. Edit
/etc/
ntp.conf
and add your server line(s). (See
Appendix C - Helpful Linux Information
for information
on a simple editor.) Here is an example:
server 192.168.1.1
Or, if you have set up a domain name server via
netconfig
, here is another example:
server your.timeserver.com
IMPORTANT
Now save the edited file and copy it to the non-volatile flash partition with this command:
cp -p /etc/ntp.conf /boot/etc
Do not remove the server lines for the refclock. Even if your Time Server is not connected to an antenna,
the refclock server lines must remain.
Summary of Contents for Meridian II
Page 2: ......
Page 20: ...M e r i d i a n I I U s e r M a n u a l This page intentionally left blank...
Page 139: ...119 M e r i d i a n I I U s e r M a n u a l R E A R P A N E L I O...
Page 216: ...M e r i d i a n I I U s e r M a n u a l 196 A P P E N D I X J...
Page 235: ...215 M e r i d i a n I I U s e r M a n u a l S P E C I F I C AT I O N S...
Page 236: ...M e r i d i a n I I U s e r M a n u a l 216 A P P E N D I X K...
Page 239: ......
