M e r i d i a n I I U s e r M a n u a l
38
C H A P T E R T H R E E
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M e r i d i a n I I U s e r M a n u a l
C O N T R O L A N D S T A T U S C O M M A N D S
If Meridian II will be mounted on a moving platform then this setting must be changed to ON. The
change takes place immediately and is stored non-volatilely. Dynamic mode is intended for ship-
board applications only.
Command:
setgpsdynmode ON
MeridianII reply:
GPS Dynamic Mode is ON
setgpsrefpos
This command starts an interactive utility that allows you to set the accurate reference position of
Meridian II This utility must be run as the root user. By default, the unit is configured to locate itself
using the GPS satellites. In some situations, visibility of the sky is limited and Meridian II will not
be able to determine its position. In this case, you must determine an accurate WGS-84 position by
other means and input it using this command. Changes you make to the position take place imme-
diately. Refer to
Appendix E - Installing the GPS Antenna, GPS Reference Position
for details.
If
the GPS dynamic mode setting is ON (see
gpsdynmode
/
setgpsdynmode
commands), then running
this utility will have no effect.
In addition to setting a new reference position, you can also invalidate an existing one. We recom-
mend you do this if Meridian II has an established position and then you move your GPS antenna.
You can invalidate an old position by setting the position mode to UNKNOWN. This will speed up
the time it takes for Meridian II to acquire a new position and relock to the GPS signal. A cold start
in unknown position mode should take about 20 minutes to lock, assuming a decent antenna installa-
tion.
Command:
setgpsrefpos
MeridianII reply:Interactive utility is started.
setinhibitoutputsmode
This command allows you to set the inhibit mode of the timing outputs. Timing outputs are pulse
rates and time codes. If it is set to ON, then all timing outputs will be inhibited (not present) until the
system is locked to the GPS signal. If it is set to OFF, then all timing outputs will be present on the
rear panel at all times. This command requires one argument: ON or OFF.
Command:
setinhibitoutputsmode ON
MeridianII reply:
Inhibit Outputs Mode is ON
setpwrfltmask (Optional)
See
Chapter 10 - Rear-Panel I/O, Masking Dual Power Supply Fault Alarms
for information on
this command.
setrticmode (Optional)
This command is only available if the RTIC option has been installed. Refer to
Chapter 11 - Real-
Time Ionospheric Corrections
for more information.
Summary of Contents for Meridian II
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