Please ensure you have connected the supplied GPS antenna. Other GPS antennas may not be compatible so please contact support@em-trak.com if you are in doubt.
The GPS antenna should be mounted high with a clear view of the sky, although ideally not on top pf a mast as the pitch and roll may affect the transmitted position. It needs to be out of the direct path of RADAR or satellite communication antennas, and as far away as practical from transmitting antennas that may interfere with the signal.