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Audiovox NAV3000 Manual

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How does Audiovox Navigation work ?
The Audiovox Navigation System is a powerful tool to assist the driver in daily traffic.
Automatic route planning and guidance allows you to concentrate on the essential
things in today’s growing traffic – especially in congested areas. Complicated and
time-consuming planning with conventional city and road maps is no longer required.
You simply enter the destination before driving off, activate ‘Guidance’ and the
Navigation System does the rest. It offers you guidance advice in both an audible and
visual way. Few controls and a simple menu structure ensure ease of use.
Determination of the vehicle position
The movement of the vehicle is measured
by sensors that are integrated into the
Navigation System. The distance driven is
recorded by an electronic signal from
the speedometer and the rotary
movements of turns by the gyroscope
(a rotary measurement system).
The information from these sensors is,
however, not always exact as the values
can be affected by tire slippage, varying
tire pressure due to changes in
temperature, etc.
Data from these sensors, in conjunction with positional information received from the
Global Positioning System is transmitted to the navigation computer. The resultant
calculated position is then compared against the road network data stored on the
CD-ROM in order to display the current vehicle position.
GPS (Global Positioning System)
The Global Positioning System is based on the reception
of navigation signals from a total of currently 27 GPS
satellites orbiting the earth at a height of
13,000 miles. To determine a 3D position (with
longitude, latitude and height), signals from at
least 4 satellites must be received.
The built-in GPS receiver can handle up to 8 satellite
signals simultaneously. This allows an accuracy of
about 20 ft to 60 ft which is further improved by the
other sensors.
GENERAL INFORMATION
11
English
GPS signal
Gyroscope
Speedometer
signal
Navigation
computer
Digital roadmap
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054.346.3
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