User Manual

MM102225V1, Rev. B

Adapters for each antenna system are selected when ordering the system. If the coaxial

cable must be attached to a structure that is not compatible with any of the above hangers

or adapters, then additional materials or other special considerations may be required.

To secure 1/4-inch or 1/2-inch vertical or horizontal coaxial cables of any size, use UV

resistant, black nylon cable ties.

2.2.2.5 Weatherproofing

A kit of weatherproof tape is provided to protect coaxial connectors from the outside

elements. One roll of tape is sufficient to weatherproof four exposed outside connector

joints (More than four are required with a Top Tower Antenna).

2.2.2.6 Antenna Grounding

Grounding kits are installed to prevent the radio system from being damaged by

lightning. A grounding point should be installed at the top end of each coaxial cable run

on the tower. A second grounding point should be installed on each cable at the bottom of

the tower and a third grounding point on the cable at the point where the cable enters the

building, if the tower-to-building length is greater than 20 feet. For cable runs on the

tower greater than 200 feet, additional grounding points should be installed at each 200-

foot interval. Grounding points should be installed at the Tower Top Amplifier as well.

2.3 TOWER TOP AMPLIFIER

The Tower Top Amplifier (TTA) should be installed near the receive antenna in order to

improve the receive (inbound) channel performance. The amplifier should be mounted to

the tower structure with corrosion resistant hardware and grounded to the tower structure

with a #6 AWG solid or stranded copper conductor. All TTA ground connections,

whether to tower frame (angular or circular) or a tower ground buss, should be made with

corrosion resistant hardware.

For the TTA a "drip loop" in the RF cable from the antenna is recommended.

2.4 SITE REQUIREMENTS

This section provides information for preparing the facility prior to installing the

equipment. This information includes proposed equipment layout, environment, electrical

power and telephone line installation.

2.4.1

Floor Plan

Direct access to the area (for antenna cables and personnel) between the tower and the

equipment room is necessary. Standard floor plans for the equipment cabinets are side-

by-side cabinets. Lengths of interconnect cables supplied are based on these standard

floor plans. If a floor plan other than a standard floor plan is used, longer interconnect

cables may be required.

2.4.2

Operating Environment

The equipment room where the base station equipment is installed must meet the

environmental conditions listed in the Station Specifications section of this manual.