For Slip And Roll Measurements; Antenna Placement - Racelogic VBOX 3iSL User Manual

VBOX 3iSL User Guide

For Slip and Roll measurements

1. Follow the same steps as „Slip & Pitch measurement‟ guide, but mount the antennas 90° to the true heading of the vehicle such that the primary antenna
(Port A) is on the left hand side of the roof. Minimum recommended separation between the antennas is 0.5m on a level plane, but the greater the
separation distance, the better the accuracy.
2. Using the VBOX Manager, go into SETUP->VBOX->DUAL ANTENNA-> and tick „ROLL MODE‟.
3. Go into SETUP->VBOX->DUAL ANTENNA->SEPARATION and enter the separation of the antennas.
4. Try to avoid placing the antennas close to the edge of the roof as this may result in poor dual lock. This is because reflections from the ground will disturb
the signals.
5. Driving forward should now bring on the green DUAL LED.

Antenna Placement

Whilst installation and use of the VBOX3iSL is intended to be fast and simple, careful attention must be paid to placement of the antennas.
It is essential that the separation of Antenna B from Antenna A is exactly the same as the separation value set inside the VBOX3iSL via the VBOX Manager. 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.
The supplied tape measure will help ensure an accurate antenna separation.
Antenna A is the primary antenna, from which all calculations are based. Therefore the primary antenna should be placed relative to where you wish to make your
measurements from. For example, If you wish to make measurements from the centre of the vehicle, the primary antenna should be placed at the centre of the
vehicle.
When measuring Slip angle, Antenna B can be placed either in front or behind Antenna A (when in pitch configuration). If it is placed behind Antenna A then the
„Swap Antenna‟ option needs to be enabled using the VBOX Manager (see „How to setup Dual Antenna VB3i SL using VBOX Manager‟ section).
01/12/2011
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