VIETA CDV7500GP Owner's Manual page 7

Installing the GPS Antenna / Aerial
End user must read this section before installing the GPS
Antenna / Aerial.
Caution:
Do not cut the GPS antenna / aerial lead to shorten
it or use an extension to make it longer. Altering the aerial
cable could result in a short circuit or malfunction and
permanent damage to the navigation system.
Connecting the GPS Antenna / Aerial to the unit
GPS AERIAL
FUSE
Installation Notes
The aerial should be installed on a level surface where radio
waves will be blocked as little as possible. Radio waves cannot
be received by the antenna / aerial if reception from the satellite
is blocked. Installation on the vehicle roof or boot lid is
recommended to optimism reception.
When installing the GPS antenna / aerial inside the vehicle, be
sure to use the metal sheet provided with your system. If this is
not used, the reception sensitivity will be poor.
Do not cut the accessory metal sheet. This would reduce the
sensitivity of the GPS aerial.
SCREW
Note: Always use the provided screw
to fasten the GPS Antenna / Aerial.
Roof
Rear shelf
BR - 7
GPS AERIAL
5M
Boot lid