User Guide

Technical Documentation
NHB–3
PAMS
Troubleshooting
Original 26/97
Page 6
Introduction
General
The purpose is to define fault block of the module and then find out the broken com-
ponent. The trouble shooting diagram has been planned so that the fault, whatever
it is, can be found by as simple measurements as possible.
The flow diagrams give you the overview of the blocks. The purpose is that you
proceed through the flow diagram so that, if your answer is YES for the asked
question, go straight to the next level, but if your answer is NO, you have to go
the subbranch.
Required servicing equipment:
– PC for PC locals
– Power supply (2.0 A)
– Digital multimeter
– Oscilloscope
– Spectrum analyzer
– RF cables
– Modular cable
– RS232/MBUS adapter
– CMT/Marconi
– RF measuring chassis