User's Manual Part 2

92 Part ######A revision 00a-DRAFT March 29, 2006
Macro Base Station Installation Procedures (NPM-1000)
Install the GPS Antennas
This procedure describes how to install two Zyfer GPS antennas on top of 1-inch-diameter, hollow
pipes using the supplied hardware. Consult your field engineering package for any site-specific GPS
antenna installation requirements.
Figure 5.1 shows the Zyfer GPS antenna assembly.
Figure 5.1 GPS Antenna Assembly
Before You Begin
Before you begin to install the GPS antennas:
 Select an installation location away from any objects that might obstruct satellite visibility to
10° of the horizon. Obstructions may cause a degradation of the GPS clock module’s
performance.
 Each antenna must be mounted at least 50 cm (20 inches) from the other antenna and any
other GPS antennas that may be present.
 Ensure that the type and length of cabling used to connect the GPS antenna to the GPS clock
module meets your attenuation and shielding requirements.
WARNING: Before proceeding with the installation of the antennas, consult the
applicable local code of wiring for requirements, including: clearance from power and
lightning conductors, proper mounting methods, and antenna grounding.
00425
TNC Connector
Set Screw
GPS Antenna
Coaxial Cable