Globalstar GSP-2800, Руководство по установке

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Introduction
1
Introduction
Figure 1. General RAU pole mount installation
Installing a QUALCOMM Globalstar Fixed Satellite Phone (QGFSP)
is not the same as installing a telephone or a satellite dish for
television. For example:
1. The RAU must have a clear view of the entire sky or it will not
work. The antenna of the RAU should have an unobstructed view
of the sky down to 10 degrees above the horizon (see Figure 1).
2. Grounding of the entire QGFSP system is vital and must be done
correctly in order to protect the QGFSP and the people who use
it. If the RAU, junction box, or wiring are improperly installed,
or if the system is not properly grounded, there is, in extreme
circumstances, risk of fire, personal injury, or death.
This guide explains how to install the components of the QGFSP. In
this guide, we call the complete unit, including the telephones, the
QGFSP. When we talk about the QGFSP, we are talking about the
entire Globalstar installation.
Figure 1 shows an example of how the radio antenna unit (RAU) and
junction box might be installed using a pole mounted on the outside
of the building.
The basics of good antenna location
It is important that you install the RAU in a good location. But just
what is a good location? Read on. We’ll try to explain.
The antenna of the RAU needs to have a direct line of sight to the
Globalstar satellites. That means it needs to be able to see the sky
with nothing in the way.
You may be familiar with television satellites that are in a fixed
location in the sky. For those satellites, you can aim an antenna at
one place, and it doesn’t matter whether you have a clear shot to any
other part of the sky.
Globalstar is different
Globalstar satellites move. They come up over
the horizon, zip across the sky, and then drop behind a hill. They
follow different paths.
052AB_1999Q
12V power
supply
Junction box
(outside wall)
ground rod
Ground wire
Ground level
Telephone
Inside
Building
RAU cable
(outside line)
(outside line)
Telephone cable (inside line)
Power cable (inside line)
Antenna
Radio unit
RAU
(Mount RAU for
clear view of sky
and horizon)
10
°
10
°
Reception zone
Pole not
supplied