Please note that the unit will need to have a full RTK lock to perform this procedure – if the orange ‘RTK’ light is flashing,
the procedure cannot be initiated.
Pitch / Roll Angle Offset
It is not always possible to mount the antennas on a vehicle so that they are perfectly level. In order to compensate for
non-level antenna placements you should use the Pitch and/or Roll offset facility, which will automatically compute and
then use an offset compensation.
Measuring Roll angle:
To measure Roll angle accurately with Antennas A and C will require the antennas to be aligned as close as possible to
a line perpendicular 90
o
to the longitudinal line of the car.
Setting Pitch / Roll Offset
Press the ’■’ button to enter the Main menu then select the Setup Antenna Menu, and then select either the Pitch or Roll
antenna setup menu.
From within either the Pitch or Roll antenna setup menu select either Pitch or Roll offset menu, when the screen shows
‘CALC OFFSET’ press the ’■’ to calculate a PITCH or ROLL offset.
If required, the Pitch or Roll angle offset can be re-calculated at any time by repeating this procedure. Selecting the
‘Clear Offset’ option will also clear the current offset value.
Setting Slip Angle Offset Remotely Via CAN
It is possible to request that the VB20SL3 calculates a Slip Angle Offset by sending it requests via CAN.
The CAN Baud rate is 500Kbit/s, Motorola 11 bit – Standard Frame, The DLC = 8
The VB20SL3 will respond on CAN to indicate stages of the Slip offset process and also indicate completion or failure.
https://racelogic.support//01VBOX_data_loggers/VBOX_II_Range/VBOX_II_User_Guide/08_-
_VBOX_20SL_Slip%2F%2FRoll_Angle_Offsets
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