iSXblue/SXBlue II GNSS Series Technical Reference Manual
108
If the Auto-Dif algorithms do not find that there has been sufficient data collected, the iSXBlue/SXBlue II
GNSS will send the following response:
$>JRAD,3,FAILED,Not Enough Stable Satellite Tracks
If you receive the failure message after a few minutes of operation, try again shortly until the ‘OK’
acknowledgement message is sent. The Auto-Dif application will begin operating as soon as the
$JRAD,3,OK message has been sent, however, you will still need to define a reference position for Auto-
Dif using the $JRAD,1,lat,lon,alt , unless relative positioning is sufficient for your needs.
5.7.6
$JRAD,9
This command initializes the Base Station feature and uses the previously entered point, either with
$JRAD,1,P or $JRAD,1,lat,long,alt, as the reference with which to compute Base Station corrections.
When using this command, the position output by the receiver will not vary (as opposed to the $JRAD,2)
and is the preferred method.
This command has the following format:
$JRAD,9,1,1<CR><LF>
The receiver will reply with the following response:
$>JRAD,9,OK
To disable the base station mode the following command should be sent:
$JRAD,9,0
Note – The $JASC,RTCM,1,PORTy command must be sent to the receiver to start outputting
standard RTCM corrections. The other receiver (rover) must be set to use RTCM corrections
coming in from one of its communication ports.
If operating the iSXBlue/SXBlue II GNSS with the latest version of the Auto-Dif firmware, the
$JMODE,BASE,YES
command (followed by a $JSAVE) can be used to configure the receiver to
automatically restart in Base Mode after a power cycle. Allow 4 to 5 minutes for the receiver to start
outputting RTCM correction after power up.
To take the receiver out of this permanent base mode status, issue the following command:
$JMODE,BASE,NO
followed by a $JSAVE.
5.8
Local Differential Commands
The Local Differential Commands are used for all three modes of local differential operations: Local-Dif,
Local-RTK and Local-Base. Make sure proper application is activated on the iSXBlue/SXBlue II GNSS
before operation.