Antenna Types And Placement - Racelogic VB20SL User Manual

VB20SL User Guide

Antenna Types and Placement

Whilst installation and use of the VB20SL is intended to be fast and simple, careful
attention must be paid to placement of the two antennas.
Note: It is essential that the separation of the two antennas is exactly the same as
the value set in the unit's configuration screen. If the separation is incorrect, data
may not be given or may be inaccurate. The measured distance between the
antennas should be the straight-line distance between the antennas regardless of
the mounting angle. It is not the 2D distance between the antennas as viewed from
above.
Antenna A is the primary antenna, from which all calculations are based. If overall slip is to be measured
(at the centre of the vehicle), the primary antenna should be placed rearward of the secondary. Alignment
of the antennas is not completely essential as the Slip Angle Sensor has the ability to calculate any offset.
See the Slip Angle Offset Section.
However if you wish to measure Pitch or Roll then the alignment of the antennas must be in line with the
o
vehicle or at 90 as accurately as possible.
The picture above shows a typical antenna placement for the measurement of Body Slip Angle and Pitch
angle.
The picture to the left shows a typical antenna placement for the measurement of Body Slip Angle and
Roll angle.
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