Maintenance Guide

Cobham Wireless
idDAS Installation and Maintenance Guide 00109GU Rev. 2.0
Page | 99
Terminology
COLUMN
DEFINITION
LRU/SRU
LRU – Line Replaceable Unit; SRU – Shop Replaceable Unit
Maintenance Category
IS (Inspection)
CL (Cleaning)
FC
(Function Check)
RP (Replacement)
VC (Visual Check)
6.4 idDAS System Routine Inspections
For optimum performance of the idDAS system, perform the following inspections on every site visit, at least
once a year or more often as required by site conditions. Remove any excessive dust accumulations using
standard procedures and tools for this type of equipment.
NOTE: To avoid potential signal loss and performance degradation: If a fibre is disconnected be sure to
clean the fibre connector and the SFP according to standard fibre-optic cleaning and verification procedures
before reconnecting.
Routine inspections
1
Site inspection
x
Inspect the installation site for moisture, loose wires or cables, and
excessive dust.
x Make sure that the power and grounding cables are
arranged so that
they do not obstruct access to other device components.
2
Ground and power
connections
x
Inspect the rack and elements power and ground connections.
3
Fibre
and coax connections
x
Inspect the fibre and coax connections.
4
Airflow around elements
x
Make sure that airflow is unobstructed around the devices and into
any openings in the enclosures.
5
Dust
x
Make sure the fins of the remote units (idRUs) and the fan-hood do
not have excessive dust deposits.
x
Make sure the fans of the MTDI and MSDH units do not have
excessive dust deposits.
6
Power supply LEDs
x
Routinely check the PWR LED on the power supplies front panel. If
this LED is solid green, the power supplies are functioning normally.
7
Front panel LEDs
Check the status LEDs on the front panel of the elements and verify they
are green. See section
6.1.