VB2SX20SPS User Guide
Page 10 of 24
GPS Antenna
The GPS Antenna supplied with the VB2SX20SPS is a 3.5v active antenna. For the best possible
signal quality, it is important to maintain a clean connection between the antenna and the VBOX.
Before fixing the antenna 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.
GPS antennas require a ground plane to operate correctly. Usually, the metal roof of a vehicle performs this function. However, if a test requires an antenna
to be placed off of the vehicle, then a special Ground Plane ‘mushroom-style’ antenna must replace the off-vehicle antenna, as these antennas are capable of
operating without a ground plane. The Ground Plane ‘mushroom’ style antennas RLVBACS065 are available from your VBOX distributor.
