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 52
C H A P T E R S I X
53 T e m p u s L X G P S 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
position of the Tempus LX. By default, the unit is configured to locate itself using the GPS satellites.
In some situations, visibility of the sky is limited and the unit will not be able to determine its posi-
tion. In this case, the user must determine an accurate WGS-84 position by other means and input
it using this command. If you need to set the accurate reference position, you must run this script as
root. The changes take place immediately. Refer to Appendix D - GPS Reference Position for de-
tails.
If the GPS dynamic mode setting is ON (see
gpsdynmode
/
setgpsdynmode
commands), then
running this script will have no effect.
In addition to setting a new accurate, reference position, the user can also invalidate an existing
one. This will force the Tempus LX to re-establish a new reference position using the GPS satellite
constellation.
Set:
setgpsrefpos
Tempus LX response: Interactive shell script is started.
setsigfltmask
This command allows the user to enable or mask the Signal Loss Fault. Parameter for this command
is either MASKED or ENABLED. Setting this command to MASKED will prevent a signal loss
fault from creating an alarm condition. Some installations may need to mask this fault when operat-
ing the NTP server as a Stratum 2 server. The factory default setting is ENABLED.
Set:
sigfltmask MASKED
Meridian response:
Signal Loss Fault Mask set to MASKED
sigfltmask
This command displays the current setting for the Signal Loss Fault Mask.
Query:
sigfltmask
Meridian response:
Signal Loss Fault is ENABLED
unlockkp
This command unlocks access to the front-panel keypad EDIT key. When the EDIT key is locked,
it will prevent unauthorized tampering with the unit. All other keys are still enabled so you may
continue to read the status and current settings of the Tempus LX. Refer to the
kplockstat
and
lockoutkp
commands.
Set:
unlockkp
Tempus LX response:
Front-panel keypad EDIT key enabled.
updaterootflag
This command allows the user to update the configuration of the Linux bootloader after a new root
file system image has been uploaded to the UPGRADE root file system partition,
/dev/rootfs_1
of the
Tempus LX FLASH disk. It may also be used to reset the default back to the FACTORY root file sys-
tem partition. Refer to
Appendix B - Upgrading the Firmware
for detailed instructions for perform-
ing the upgrade procedure. One argument is accepted, whose value is either 0 or 1, causing a flag to
be set that will indicate to the bootloader which root file system image should be loaded by default.
If an argument value of 2 is given, then the currently configured default root file system is shown.