become intermittent.
The VB20SL must only be used with the supplied antenna, unless instructed otherwise by Racelogic.
GPS Antenna
The GPS Antennas supplied with the VB20SL3 are 3.5v active antennas. For the best possible signal quality, it is
important to maintain a clean connection between the antennas and the VBOX. Before fixing the antennas to the VBOX,
ensure that there are no dust particles in either connector. Replacement antennas are available by contacting your
VBOX distributor.
The antenna is a magnetic mounting type for quick and simple mounting to the vehicle roof. For optimum GPS signal
reception, make sure that the antenna is fitted to the highest point of the vehicle away from any obstructions that may
block satellite reception. The GPS antenna works best with a metal ground plane underneath (eg. Vehicle roof).
Please also note that when using any GPS equipment, a clear sky view is important. Objects in the surrounding area
such as tall buildings or trees can block the GPS signal causing a reduction in the number of satellites being tracked, or
introducing reflected signals that can decrease the accuracy of the system.
NOTE: VB20SL3 can struggle with maintaining an RTK lock required for Slip, Pitch and Roll measurement if the
antennas are placed too close to Roof Bars. If a poor mounting position cannot be avoided then use Ground
plane antennas, RLVBACS065.
Using the VB20SL3 With One GPS Antenna
The VB20SL3 can be used like a traditional VBOX. Only Antenna A is needed if the VB20SL3 is to be used like a
traditional VBOX without the requirement to measure Slip, Pitch, Roll, YAW rate and Lateral Acceleration channels.
For single antenna use (for standard, non-slip GPS data), the antenna should be connected to the Ant A connector.
https://en.racelogic.support//Product_Info/VBOX_Data_Loggers/VBOX_II_Range/VBOX_II_User_Guide/07_-
_VBOX_20SL3_Triple_Antenna_Placement
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