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VT4000 INSTALLATION GUIDE
GPS RECEPTION
Activate the product in an area without large buildings to improve GPS
reception.
The commercial purpose GPS has the average range error of more than 15
meters and the range error could be more than 100 meters due to
environmental conditions like buildings, roadside trees etc.
The temperature range for optimum operation of the GPS receiver in your
vehicle is -10 ~ 50°C.
When using the product for the first time or after a long period (more than
three days), it may take a little longer to recognize your current location.
It may take between five and thirty minutes to get GPS reception.
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If there is an object at the end of the GPS antenna.
If your vehicle has metallic elements on the windshields.
If equipment generating electromagnetic waves that interfere with the GPS
signal is installed in the vehicle e.g.: Other GPS devices such as a certain
type of wireless activated alarms, MP3, DAB and CD players and camera
alarms using GPS.
If you are using a receiver connected by cable, electric interference can be
avoided by simply changing the location of the receiver (antenna).
On heavily overcast or cloudy days, if the vehicle is in a covered location such
as under a bridge or raised roadway, in a tunnel, an underground roadway or
parking area, inside a building or surrounded by high-rise buildings.
If GPS signal reception is poor, it may take longer to locate your current
position when the vehicle is moving than when it is stationary.
GPS reception may be impaired under the following circumstances:
