Motorola APX Series Manual - Page 26

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APX 4500 O2 CH

ADVANCED FEATURES

 The Global Positioning System (GPS)

This feature uses information from the Global Positioning System (GPS) satellites orbiting the Earth to determine the

approximate geographical location of your radio, expressed as latitude and longitude. The availability and accuracy of this

location information (and the amount of time that it takes to calculate it) varies depending on the environment in which you are

using the GPS feature.

For example, GPS location fixes are very difficult to obtain indoors, in covered locations, between high buildings, or in situations

where you have not established a clear broad view of the sky.

Understanding the GPS Feature

The GPS technology uses radio signals from earth orbiting satellites, to establish the location coordinates, maximizing your view

of clear unobstructed sky is essential for optimum performance.

Where adequate signals from multiple satellites are not available (usually because you cannot establish a view of a wide area of

the sky), the GPS feature of your radio will not work. Such situations include but are not limited to:

•

In underground locations

•

Inside of buildings, trains, or other covered vehicles

•

Under any other metal or concrete roof or structure

•

Between tall buildings or under dense tree-cover

•

In temperature extremes outside the operating limits of your radio

Even where location information can be calculated in such situations, it may take longer to do so, and your location estimate may

not be as accurate. Therefore, in any emergency situation, always report your location to your dispatcher.

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