EndRun Sonoma N12, Руководство пользователя

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S o n o m a U s e r M a n u a l 84
C H A P T E R N I N E
85 S o n o m a 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
from creating an alarm condition. Some installations may need to mask this fault due to special
antenna situations like splitters or DC blocks that confuse the antenna detection circuit. The factory
default setting is ENABLED.
Command:
setantfltmask MASKED
Sonoma reply:
Antenna Fault Mask set to MASKED
setcaldelay
This command starts an interactive utility that allows you to change the clock calibration delay. This
setting is used to advance or retard the clock in order to compensate for antenna cable length or other
external hardware or cabling. Allowable range is ±500,000 nanoseconds.
Command:
setcaldelay
Sonoma reply: Interactive utility is started.
setgpsdynmode
This command accepts a single argument: ON or OFF to allow you to set the dynamic mode of
operation of the GPS Subsystem. By default, the unit is configured for static operation, so this setting
is OFF. If the Sonoma will be mounted on a moving platform, like a ship, then this setting must be
changed to ON. The change takes place immediately and is stored non-volatilely.
It is important that the dynamic mode be set OFF when the instrument is in a static installation. This
is the factory-default setting. Set the dynamic mode to ON only if the instrument is installed on a
moving platform such as a ship.
Command:
setgpsdynmode ON
Sonoma reply:
GPS Dynamic Mode is ON
setgpsrefpos
This command starts an interactive utility that allows you to set the accurate reference position of
Sonoma. 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 Sonoma 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 Sonoma 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 Sonoma to acquire a new position and relock to the GPS signal. A cold start in un-
known position mode should take about 20 minutes to lock, assuming a decent antenna installation.