User's Manual

Chapter 2 Planning a CCU/Repeater Installation
12 CCU 100 and Repeater 100 Installation Guide
Proprietary and Confidential
Lightning Arrestor
A lightning arrestor (or surge protector) capable of withstanding multiple lightning strikes
should be installed when using a remote/external antenna. This helps protect the
CCU/Repeater in the event of a lightning strike.
The lightning arrestor is fitted to the coaxial antenna cable at the SURGE end and the RF
jumper cable that connects to the CCU/Repeater module at the PROTECTED end. It
includes a bulkhead connector interface that mounts to a ground plate with a washer and
nut. The arrestor is also furnished with a ground lug, if your installation does not have
provisions for a ground plate. The ground lug on the arrestor is designed for #2AWG
solid or stranded wire. The ground wire must be crimped to this lug, never soldered.
Caution The lightning arrestor must be connected to an earth-ground.
The top and bottom ends of the coaxial cable attached to the tower should be electrically
grounded with kits for lightning protection. The antenna input connection cannot serve as
the top ground point. For cable lengths in excess of 200 feet, ground the vertical cable run
every 100 feet.
Note The installer must supply any mounting brackets and cable-management clips
to secure the coaxial cable to the tower or structure, when using a remote/external
antenna. Consult your cable manufacturer for specifications on proper clips and
grounding kits. Conduit clamps and tie wraps are not satisfactory methods for
securing coaxial cables.
For a remote 900 MHz installation with a high gain antenna, a lightning arrestor is
supplied by Itron in the CCU 100/Repeater 100 kit materials.