Nokia NSM-1 Series Leitfaden

NSM–1 Series Transceivers

PAMS Technical Documentation

Original 10/98

Tuning Instructions

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 2 Original 10/98

CONTENTS

Tuning Instructions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Required Equipment 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Setup 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Setup for Tuning a Phone without Removing Covers 5. . . . . . .

Flash Concept for NSM–1 6. . . . . . . . . . . . . . . . . . . . . . . . . . .

Tuning With Covers Off – Using Test–frame JBS–19 7. . . .

Tuning With Covers Off – using Light Jig JBT–1 8. . . . . . . .

Warranty Transfer 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

1. RX Calibration (AGC + AFC) 10. . . . . . . . . . . . . . . . . . . . . .

2. Alignment of Transmitter Power Levels 12. . . . . . . . . . . . .

3. I/Q Modulator Alignments 14. . . . . . . . . . . . . . . . . . . . . . . . .

4. Energy Management Calibration 16. . . . . . . . . . . . . . . . . . .

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 3

Original 10/98

Tuning Instructions

General

All tuning operations of the NSM–1 are carried out using the service soft-

ware. 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 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 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.

During tuning, proceed as follows:

– 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!

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 4 Original 10/98

Required Equipment

– PC with service software; see separate section for instructions on

installation and use.

– Service accessories; see equipment setup pictures.

– Multimeter or DVM.

– GSM radio telephone test station or separate measuring equipment as

follows: – RF generator

– pulse power meter

– spectrum analyzer

– attenuator and branching unit

Equipment Setup

Caution: Make sure that you have switched off the PC and the printer

before making connections !

Caution: Do not connect the PKD–1 key to the serial port. You may

damage your PKD–1 !

Attach the protection key PKD–1 to parallel port one (25–pin female

D–connector) of the PC. When connecting the PKD–1 to the parallel port

be sure that you insert the PC end of the PKD–1 to the PC (male side). If

you use a printer on parallel port one, place the PKD–1 between the PC

and your printer cable.

Next connect the M2BUS service cable, DAU–9P, to the serial port

(RS–232) of the computer. Attach one end of the service cable to the PC

serial port and the other end to the service box, JBA–4. For servicing the

phone with the covers in place the service box should always be used.

When the phone covers are removed the jigs should be used.

For audio measurements connect the audio cable, ADS–1, as follows:

– EAR line to AF INPUT of test equipment

– MIC line to MOD GEN OUTPUT of test equipment

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 5

Original 10/98

Equipment Setup for Tuning a Phone without Removing Covers

Item: Service accessory: Product code:

1 Service Battery BBD–3 0775071

2 DC Cable SCB–3 0730114

3 Service MBUS Cable DAU–9P 0730109

4 Software protection key PKD–1 0750018

5 Service SW diskette 3.5” for WinTesla 0774046

6 Service SW diskette 3.5” for NSM–1 0774080

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 6 Original 10/98

Flash Concept for NSM–1

12.

9B. 8.

10.

11.

13.

9A.

Item: Service accessory: Product code:

1 Flash Loading Adapter FLA–5 0080178

2 Flash Security Box TDF–4 0770106

3 Prommer FPS–4S 0085095

4 Service Battery BBD–3 0775071

5 Service Cable SCH–5 0730098

6 DC Cable PCC–1B 0730053

7 D15 – D15 Cable AXS–5 0730091

(Included in FLA–5 sales pack)

8 Printer Cable (Included in FPS–4 sales pack) 0730029

9A D9 – D9 Cable AXS–4 0730090

(Included in FPS–4 sales pack)

9B D9 – D9 Cable AXS–4 0730090

10 Software protection key PKD–1 0750018

11 Service SW diskette 3.5” for NSM–1 0774080

Service SW diskette 3.5” for WinTesla 0774046

12 Travel Charger ACH–6E (Euro) 0270381

Travel Charger ACH–6U (USA/Japan) 0270382

Travel Charger ACH–6X (UK) 0270380

13 AC Charger ACL–3E 0680015

(Included in FPS–4 sales pack)

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 7

Original 10/98

Tuning With Covers Off – Using Test–frame JBS–19

Item: Service accessory: Product code:

1 Module Jig JBS–19 * 0770098

SIM–Card Holder CAH–1 0770112

2 Service Audio Box JBA–4 ** 0770094

3 DC Cable PCS–1 0730012

4 External Antenna Cable XRC–1B 0730128

5 Service Cable SCH–5 ** 0730098

6 Service MBUS Cable DAU–9S ** 0730108

7 Audio Cable ADS–1 0730011

8 Software Protection Key PKD–1 0750018

9 Service SW diskette 3.5” for WinTesla 0774046

Service SW diskette 3.5” for NSM–1 0774080

*) The nominal operating voltage for JBS–19 is 3.6 V.

The supply voltage for JBS–19 must never exceed 5.0 V

**) SCH–5, JBA–4, and DAU–9S can be replaced with DAU–9P

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 8 Original 10/98

Tuning With Covers Off – using Light Jig JBT–1

Item: Service accessory: Product code:

1 Light Module Jig JBT–1 * 0770109

2 Service Audio Box JBA–4 ** 0770094

3 DC Cable PCS–1 0730012

4 External Antenna Cable XRC–1B 0730128

5 Service Cable SCH–5 ** 0730098

6 Audio Cable ADS–1 0730011

7 Service MBUS Cable DAU–9S ** 0730108

8 Software Protection Key PKD–1 0750018

9 Service SW diskette 3.5” for WinTesla 0774046

Service SW diskette 3.5” for NSM–1 0774080

*) The nominal operating voltage for JBT–1 is 3.6 V.

The supply voltage for JBT–1 must never exceed 5.0 V

**) SCH–5, JBA–4, and DAU–9S can be replaced with DAU–9P

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 9

Original 10/98

Warranty Transfer

Item: Service accessory: Product code:

1 Warranty Cable SCH–6 0730099

PAMS

Technical Documentation

NSM–1

Tuning Instructions

Page 10 Original 10/98

Tuning Steps

1. RX Calibration (AGC + AFC)

Procedure

Follow the steps described in chapter ”Service Software Instructions” sec-

tion ”RX calibration... command”.

Software reports the following:

AFC init value

AFC slope

PSW slope

AGC DAC values and the corresponding voltages for each gain step (0 -

57 dB)

Limits for the reported values

If everything went well the reported values should approximately be the

following:

Parameter Low limit High limit

AFC init value –80 80

AFC slope 130 230

PSW slope 250 350

AGC 0 dB 400 640

AGC 57 dB 100 300

Difference between the two neighbour

AGC steps 10 20

Troubleshooting

If the calibration does not succeed the software normally reports ”Unable

to read data from phone” or ”Failed to set high reference” or ”Failed to set

low reference”.

In this case check first the basic functionality of the receiver chain: RF

generator frequency set as in the calibration and level for example to the

high reference value.

Then go to the RSSI reading menu (under RF controls). If the reading is

very low there is something broken in the receiver and must be found by

measuring voltages and signal levels at different places (information of

these can be found elsewhere in this manual).

If the RSSI reading seems to be within 5 - 10 dB the same as the RF in-

put level check that the VCTCXO (G650) frequency is close enough the

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