Chapter
9
Installation
of GPS Antenna Feeder System
9-3
5. General tools: Adjustable wrench, sharp nose pliers, diagonal pliers, electrical
knife, file and hacksaw;
6. Protection tools: Safety belt, safety helmet, safety rope, thick working clothes,
RF prevention clothes, canvas tool bag, gloves, and multi-purpose sockets;
7. Other tools: Herringbone ladder and the wooden wheel axis for uplifting the
primary feeder cable (which can be borrowed locally).
9.2 Composition of GPS Antenna Feeder System
See Fig. 9.2-1 for the composition of the GPS antenna feeder system.
Sleeve
Fixing clip
Micro-
BTS
GPS antenna
Coaxial cable
Fig. 9.2-1 Composition of the GPS Antenna Feeder System
9.3 Installation Procedures
As the CDMA clock and frequency reference, GPS plays a very important role. The
GPS antenna receives navigation and position signals of GPS satellites, demodulates
frequency and clock signals through a GPS signal receiver and provides these signals
to related elements of CDMA BTSs.
1. Requirements on GPS antenna installation
The GPS antenna should be installed in an open and high place, so that it can
trace more satellites, for example, on the top of a building or on a tower. Make
the GPS feeder cable as short as possible to minimize the attenuation.
The GPS antenna should be installed in the lightning protection area of the
tower; otherwise, a lightning rod should be customized and installed for the GPS
antenna.