User Guide

TUNING INSTRUCTIONS
9618ARo
6–3–2
NHC–4
Technical Documentation
Copyright  Nokia Mobile Phones
Tuning Instructions
General
In contrast to earlier second–generation analog cellular phones tuning opera-
tions of the NHC–4 are carried out using the Service software. The Service pro-
gram turns the phone into the Locals mode, in which the phone can be out-
wardly controlled via the M2BUS interface.
The tuning values of the phone reside on the EEPROM. Before tuning these
values are read to the Service software and the user can change these values
with tuning functions.
N.B. During tuning, proceed as follows:
– Take care not to damage sensitive measuring instruments with excessive
RF power.
– Carry out all tuning steps in the shortest possible time to avoid excessive
heating of RF units.
– Perform all tuning steps in the order presented.
– Never try to mask a fault by tuning it out!