Nokia 6081, NME–2A Tuning Instruction

Programmes After Market Services (P.A.M.S.)

Technical Documentation

NME–2A SeriesTransceivers

Tuning Instructions

Issue 2 05/2000

NME–2A

Tuning Instructions

P.A.M.S.

Technical Documentation

AMENDMENT RECORD SHEET

Amendment
Number

Date Inserted By Comments

08/97 Original

Issue 2 02/2000 OJuntune ARS added

Fig. p.7, p.8 updated

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Issue 2 05/2000

P.A.M.S.

NME–2A

Technical Documentation

Tuning Instructions

Contents

General 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Required Equipment 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Setup 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting The Program 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting options for PCLocals service software 9. . . . . . . . . . . . . . . . . . . .

Tuning Steps 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. RSSI Reference Signal Level Storage 10. . . . . . . . . . . . . . . . . . . . . . . . .

2. AFC Diagram Storage 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. I/Q Modulator Amplitude Balance and Phase Shift Tuning 11. . . . . . . .

4. Tuning of Transmitter Power Levels 13. . . . . . . . . . . . . . . . . . . . . . . . . . .

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NME–2A

Tuning Instructions

Technical Documentation

List of Figures

Figure 1. Equipment setup with Audio Test Box -Tuning 7. . . . . . . . . . . . . .

Figure 2. Equipment setup without Audio Test Box - Tuning 8. . . . . . . . . .

Figure 3. Amplitude Balance /Phase Shift Graph 11. . . . . . . . . . . . . . . . . . .

P.A.M.S.

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Issue 2 05/2000

P.A.M.S.

NME–2A

Technical Documentation

General

Most of the tuning are done with help of the PCLocals software. The
PCLocals program turns the phone into the Locals mode, in which the
phone can be outwardly controlled via the M2BUS interface.

Tuning is based on the PCLocals 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 contents of
the EEPROM can be read by the PCLocals program 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.

If a repair has been carried out on the RF section of a system module
then
the appropriate tunings should be performed as described in the following
section and using the on-screen help menus as a guide. Spare system
modules will be delivered pre-tuned from the factory and will not require
re-tuning.

N.B. During tuning, proceed as follows:

Tuning Instructions

– Take care not to damage sensitive measuring instruments with exces-

sive RF power.

– Carry out all tuning steps in the shortest possible time to avoid exces-

sive 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 PCLocals software; see different PCLocals

Instructions for instructions on installation and use.
– M2BUS adapter DAU–2 and other service accessories; see equipment

setup pictures.
– Multimeter or DVM.
– Power supply 13.2 V and minimum 5 A current capability.
– GSM radio telephone test station or separate measuring equipment as

follows:

– frequency counter (±1 ppm)
– RF generator
– pulse power meter
– spectrum analyzer
– attenuator and branching unit

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