Vector Sensor Reference Manual 65
6.3.5 $JLIMIT
This command is used to change the threshold of estimated horizontal performance for which the
DGPS position LED is illuminated. The default value for this parameter is a conservative 10.0
meters. This command has the following format.
$JLIMIT,limit<CR><LF>
Where ‘limit’ is the new limit in meters.
The receiver will respond with the following message.
$>
If you with to verify the current $JLIMIT threshold, the response to the $JSHOW command
provides this information.
6.3.6 $JAPP
This command allows you to request the Vector Sensor for the currently installed applications and
to choose which application to use. Both internal GPS engines each have two copies of their
firmware in both application slots. This ensures that the application is not accidentally changed
such that the receiver fails to function correctly.
To poll the receiver for the current applications, send the following message.
$JAPP<CR><LF>
There are no data fields to specify in this message. The receiver will respond with the following
message.
$>JAPP,current,other
Where ‘current’ indicates the current application in use and ‘other’ indicates the secondary
application that is not in use currently.
To change from the current application to the other application (when a two applications are
present), issue the following command.
$JAPP,OTHER<CR><LF>
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