Users Manual Part 1

Figure 73: GPS Antenna Connection on MTS 2 Junction Panel
GPS
NOTICE: Protect the GPS Antenna with a grounded surge arrestor of the type that allows DC to
pass through. See Surge Arrestors and Suppliers on page 488 in Field Replaceable Units
(FRUs) on page 478 for more information.
Figure 74: 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.
6802800U74-AP
Chapter 4: Hardware Installation
144