
Correct Mounting of the GPS Antenna
"WARNING": To avoid any possible damage to the car paintwork, please take care when
mounting magnetic GPS antennas. In particular make sure that there is no dust or grit under
the antenna. In some cases it maybe required to add additional protection to the paintwork
prior to mounting the antenna to avoid damage.
For correct, accurate operation of the GPS receiver it is absolutely essential that the antenna is
mounted correctly.
•The antenna must be mounted on the roof of the vehicle.
•The antenna must be mounted on a horizontal orientation facing directly up. The
underside of the antenna cannot receive GPS information, similarly don't mount the
antenna on a vertical surface.
•The antenna must not be covered in tape, in particular dark coloured tapes. Many
tapes absorb the weak GPS radio signal. In general, black tapes are the worst in this
respect as they contain high amounts of carbon - however, to be safe, avoid using
any tape at all.
•The antenna must be physically remote from sources of electrical noise. The GPS radio
signal is very weak and can easily be blocked out by radio interference, so to get a
good signal the antenna must be as far away from radio interference as possible. By
far the strongest source of radio interference is a gasoline engine's ignition system, so
keep the antenna away from all aspects of it including the engine management
system, coil, leads, distributor etc.
•Avoid trapping, pinching or kinking the antenna cable. The lead from the GPS
antenna to the receiver is a special very high frequency cable and it is not normally
practical to repair it - so if you do trap, pinch or cut it then the antenna will have to be
replaced and this isn't covered by the warranty. Do not try to feed the antenna cable
through a closure gap that is too small or compress it with a door seal or window
seal.