Nokia 9000i Service Manual page 231

After Sales
Technical Documentation
Tuning Instructions
General
The service software program turns the phone into Locals mode, which
controls the phone via the M2BUS interface.
Tuning is based on the software communicating with the D/A and A/D
converters of the phone. In some instances the phone processor will also
calculate the required correction parameter.
The tuning values of the phone reside on the EEPROM. The program
enables writing the default parameters on the EEPROM, in which case all
tuning steps should be carried out.
NOTE. 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!
Required Equipment
– PC/AT computer with service software software; see Sect. 7 for
instructions on installation and use.
– M2BUS adapter DAU–2 and other service accessories; see equipment
setup pictures.
– Multimeter or DVM.
– GSM radio telephone test station or separate measuring equipment as
follows:
Amendment 1 04/97
– frequency counter ( 1 ppm)
– RF generator
– pulse power meter
– spectrum analyzer
– attenuator and branching unit
RAE/RAK–1N
Service Software
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