scope:

This instruction applies to all persons engaged in the maintenance of antenna systems and radiating cable systems used on Network Rail radio communications equipment.

Purpose

This instruction defines the maintenance requirements for antenna and feeders systems in use on Network Rail infrastructure.

The purpose of maintaining and testing these systems is to decrease the incidence of failures through deterioration and to identify potential failures before they become service affecting and to identify any problems with Fall Arrest systems or structural integrity of towers that may present a hazard to staff required to climb towers for faulting and planned maintenance purposes.