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PAMS Technical Documentation
Tuning Instructions
General
All tuning operations of the NSC-1/3 and NSW-1/3 phones are carried out using the ser-
vice software. The service software turns the phone into the locals mode, in which the
phone can be outwardly controlled via the MBUS 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 also will calculate the required correction
parameter.
The tuning values of the phone reside on the EEPROM. The contents of the EEPROM can
be read by the service software and saved as a file. This is advisable when there is need
to retain that information (e.g., in view of replacement of the circuit). The program also
enables writing the default parameters on the EEPROM, in which case all tuning steps
should be carried out.
Note: NSC-1 and -3 do not have upper band components. NSC-1 and -3 are 800 MHz transceivers.
During tuning, proceed as follows:
•
Take care not to damage sensitive measuring instruments with exces-
sive RF power.
•
Carry out all tuning steps quickly 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
1 PC/AT computer with service software. (See separate section for instructions on
installation and use.)
2 Service accessories. (See equipment setup pictures.)
3 Multimeter or DVM.
4 GSM radio telephone test station or separate measuring equipment as follows:
• RF generator
• pulse power meter
• spectrum analyzer
• attenuator and branching unit
Issue 4 03/01
Nokia Mobile Phones Ltd.
NSC/W-1/3
Tuning Instructions
Page 5
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