ComNav Vector G2/G2B Installation & Operation Configuration
Command Description
$GPMSK,parameters Tune the Beacon receiver
$J4STRING,BAUD[,OTHER]
• Enable GPGGA, GPGSA, GPVTG & GPZDA at 1 Hz
• Set both ports Baud rate to BAUD (4800, 9600, 19200,
38400)
• Do a $JSAVE (see Table 11) L
$JAGE[,age]
Query or Set the Differential Age Timeout
• age = 6 to 8100 seconds
$JATT,GYROAID[,NO/YES] Query or Enable/Disable the Gyro-Aid function
$JATT,HBIAS[,hbias]
Query or Set Heading Output Offset
• hbias range is –180° to +180°
$JATT,LEVEL[,NO/YES]
Query or Set Level Mode Operation
• YES ⇒ Tilt less than 10°
$JATT,NEGTILT[,NO/YES]
Query or Set the Pitch/Roll sign convention
• YES ⇒ reverse sign
$JATT,NMEAHE[,0/1]
Query or Set the Talker ID for heading sentences:
• 0 ⇒ all sentences use GP
• 1 ⇒ HEHDG, HEHDT, HCHDM
$JATT,PBIAS[,pbias]
Query or Set the Pitch/Roll Offset
• pbias range is –15° to +15°
$JATT,ROLL[,NO/YES]
Query or Set the Pitch/Roll function
• NO ⇒ Pitch, YES ⇒ Roll
$JATT,SEARCH Force a new RTK Search
$JATT,TILTAID[,NO/YES] Query or Enable/Disable the Tilt Sensor
$JATT,TILTCAL
Calibrate the Tilt Sensor
(the G2 must be level when this command is issued)
$JBAUD,rate[,OTHER]
Query or Set the Baud rate
• rate = 4800, 9600, 19200, 38400
(if the G2’s Baud rate is changed, change the other device too)
$JDIFF[,source]
Query or Set the DGPS source:
• NONE ⇒ Operate in autonomous mode
• WAAS ⇒ SBAS corrections
• OTHER ⇒ RTCM SC-104 corrections input through Port B
• BEACON ⇒ Radiobeacon corrections (G2B only)
$JGEO Queries frequency and location of SBAS satellites
$JMASK,angle
Set a cut-off elevation, below which satellites will be ignored
• Angle range is 0° to 60°
$JOFF[,OTHER]
Turn off all NMEA & Proprietary data output
• The $PCSI Beacon status sentences must be turned off with
a $PCSI,0,0 and/or $PCSI,1,0 command
• The RTCM output sentence must be turned off with a
$JASC,RTCM,0[,OTHER] command
$JPOS,latitude,longitude
Specify an initial position, to speed up re-acquisition time
• Latitude & Longitude must be in decimal degrees
example: $JPOS,49.2,123.1
Table 10 – Control Commands for Other Features & Functions
L Caution! $J4STRING does an automatic $JSAVE, after making the other
changes listed above. That SAVE will any include any other changes you
may have made before sending the $J4STRING command to the G2.
Document PN 29010078 V1.6 (Addendum #1) - 22 -