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Accordingly, the database may contain inaccurate or incomplete
information due to the passage of time, changing circumstances,
and due to the nature of the sources used. The database does not
include or reflect information on neighborhood safety, law
enforcement, emergency assistance, construction work, road or
lane closures, vehicle or speed restrictions, road slope or grade,
bridge height, weight or other limits, road or traffic conditions,
special events, traffic congestion, or travel time.
Radio reception factors
There are certain factors that may effect your radio reception.
• Distance/strength. The further an FM signal travels, the weaker it is.
The listenable range of the average FM station is approximately 40 km
(24 miles). This range can be affected by “signal modulation.” Signal
modulation is a process radio stations use to increase their
strength/volume relative to other stations.
• Terrain. Hills, mountains and tall buildings between your vehicle’s
antenna and the radio station signal can cause FM reception problems.
Static can be caused on AM stations by power lines, electric fences,
traffic lights and thunderstorms. Moving away from an interfering
structure (out of its “shadow”) returns your reception to normal.
• Station overload. Weak signals are sometimes captured by stronger
signals when you pass a broadcast tower. A stronger signal may
temporarily overtake a weaker signal and play while the weak station
frequency is displayed.
Principles of GPS (global positioning system) operation
Your system directs you based on information derived from global
positioning satellites, road maps stored on the DVD, sensors in your
vehicle and the desired destination. The system compiles all necessary
information to guide you to your selected destination. Space satellites
determine the vehicle’s current location and transmit position and time
signals to your car.
If the vehicle has been parked for a long period of time, the navigation
function may be temporarily unresponsive. The navigation system will
operate reliably again once GPS reception is available for a few minutes.
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)
Entertainment Systems
91
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