Gps Antenna Line Loss; Figure 73: Gps Antenna Connection On Mts 4 Junction Panel - Motorola MTS LiTE Installation, Configuration And Basic Service Manual

Figure 72: GPS Antenna Connection on MTS 2 Junction Panel
NOTICE: Protect the GPS Antenna with a grounded surge arrestor of the type that allows DC to
pass through. See
(FRUs) on page 446

Figure 73: GPS Antenna Connection on MTS 4 Junction Panel

4.8.5.1

GPS Antenna Line Loss

The maximum allowable line attenuation between the antenna and the Site Controller GPS Receiver
input is 6dB. There is an additional attenuation of 4dB for foliage. In a typical MTS installation with 1/2
inch low density foam coaxial cable (or equivalent). Do not exceed the 46 m length of the cable run.
This is sufficient for most installations.
When considering the use of longer cables, calculate the cable lengths allowing 4.5dB of loss at 1.5
GHz GPS receiver frequency. The interior site cabling and connectors provide the remaining
attenuation of 1.5 dB.
Surge Arrestors and Suppliers on page 456
for more information.
6802800U74-AN
Chapter 4: Hardware Installation
GPS
in Field Replaceable Units
GPS
131