4
GPS
RECEPTION
1.
Activate
the
product
in
an
area
without
large
buildings
to
improve
GPS
reception.
2.
The
temperature
range
for
optimum
operation
of
the
GPS
receiver
in
your
car
is
‐
10
~
50
°
C.
3.
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.
GPS
reception
may
be
impaired
under
the
following
circumstances
1) If there is an object at the end of the GPS antenna
2) If your vehicle has metallic elements on the windshields
3) 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 and CD players and camera alarms
using GPS.
4) If you are using a receiver connected by cable, electric interference can be
avoided by simply changing the location of the receiver (antenna).
5) 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.
6) 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.
The commercial purpose GPS has the average rage 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.