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11-1
11 Installing the GPS Antenna Feeder
System
Summary
This part describes:
●
Installation
preparation
for the GPS antenna feeder
system;
●
Structure of the GPS antenna feeder system;
●
Installation flow of the GPS antenna feeder system;
●
Installation procedure of the parts of the GPS antenna
feeder system;
●
Waterproof
treatment of the connectors.
11.1 Installation Preparation for the Antenna Feeder System
GPS, as the clock and frequency reference of CDMA, is of great significance.
According to the passive distance measurement principles, GPS antenna receives the
navigation positioning signals from the GPS satellites and demodulates frequency and
clock signals through the GPS signal receiver for use by the related units of the CDMA
base station.
Requirements for the installation of the GPS antenna: The installation position of the
GPS antenna should have a broad view so that the GPS antenna can track satellites as
many as possible. Usually, select a safe place on the roof or at the lower part of the
tower and try to make the GPS feeder short to reduce attenuation.
Requirements for the lightning protection of the GPS antenna: Usually, the GPS
antenna is installed within the 45° lightning protection coverage of the tower. If it is not
within the coverage, the user is required to prepare and install the lightning arrester for
it.
