Nokia NSM-3 User manual

PAMS Technical Documentation
NSM–3/3D Series Transceivers
Issue 4 02/2002 Nokia Corporation
Tuning Instructions

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
Page 2 Issue 4 02/2002
Nokia Mobile Phones Ltd.
CONTENTS

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
Page 3
Issue 4 02/2002 Nokia Mobile Phones Ltd.
Tuning Instructions
General
All tuning operations are carried out using the service software. The ser-
vice 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!

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
Page 4 Issue 4 02/2002
Nokia Mobile Phones Ltd.
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–9S, 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, JBU–6. 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.

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
Page 5
Issue 4 02/2002 Nokia Mobile Phones Ltd.
Equipment Setup for Testing Audio and Charging
7.
2.
1. 3.
4.
5.
8.
6.
DC Unit
Oscillator
9.
Item: Service accessory: Product code:
1 Service Box JBU–6 0770153
2 RF Adapter RL6 for JBU–6 0770172
3 DC Power Cable PCS–1 0730012
4 Service MBUS Cable DAU–9S 0730108
5 DC–DC Cable SCB–3 0730114
6 Software protection key PKD–1 0750018
7 Audio Box JBA–6 0770184
8 Audio Cable ADS–3 0730197
5 Service SW diskette 3.5” for WinTesla 0774046
9 Service SW diskette 3.5” for NSM–3 (3D) 0774080
Flash SW packages on CD 0775219

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
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Flash Concept with JBU–6
12.
1.
2.
3.
4.
5.
6. 7.
9B. 8.
10.
11.
13.
9A.
14.
Item: Service accessory: Product code:
1 Service Box JBU–6 0770153
2 Flash Loading Adapter FLA–7 0080326
3 Flash Security Box TDF–4 0770106
4 Prommer FPS–4S 0085095
5 DC Power Cable PCS–1 for JBU–6 0730012
6 Service Cable XMS–3 0730174
7 D15 – D15 Cable AXS–5 0730091
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 DC Cable PCC–1B 0730053
11 Software protection key PKD–1 0750018
12 Service SW diskette 3.5” for NSM–3 (3D) 0774080
Service SW diskette 3.5” for WinTesla 0774046
13 Travel Charger ACH–6E (Euro) 0270381
Travel Charger ACH–6U (USA/Japan) 0270382
Travel Charger ACH–6X (UK) 0270380
14 AC Charger ACL–3E 0680015
(Included in FPS–4 sales pack)

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
Page 7
Issue 4 02/2002 Nokia Mobile Phones Ltd.
NOTE: Changes in Sales Packs
In FPS–4S sales pack ACL–3E will be replaced by AXD–1 power cable.This cable
makes it possible to power the FPS–4 prommer with ACH–6 type charger. Same
charger has been used to power TDF–4 Flash Security Box and it must be pur-
chased separately.
AXD–1 power cable will be added to FLA–7 sales pack. This makes it possible to
power FLA–7 from TDF–4 power output or separate ACH–6 type charger.
Flash Concept Power Distribution Options
1. Two AXD–1 cables and two ACH–6 chargers – RECOMMENDED!
2. One ACH–6 and two ACL–3 chargers
1. Power distribution with two AXD–1 cables and two ACH–6 chargers:
FLA–7 powered by AXD–1 cable from TDF–4 “Power Out” connector
(It is also possible to power FLA–7 with AXD–1 and
separate ACH–6).
TDF–4 powered by ACH–6 Charger.
FPS–4 powered by AXD–1 DC cable and ACH–6 Charger.
NOTE: Do not use SCF–7 cable to power FLA–7 and FPS–4 from one ACH–6 char-
ger as done when using ACL–3!

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
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2. Power distribution with one ACH–6 and two ACL–3 chargers:
FLA–7 powered by ACL–3 charger
TDF–4 powered by ACH–6 charger
FPS–4 powered by ACL–3 charger
NOTE: It is recommended to use separate power supplies for FLA–7 and FPS–4.

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
Page 9
Issue 4 02/2002 Nokia Mobile Phones Ltd.
Testing Without Covers – Using Test–frame MJS–9
3.
1.
2.
4.
6.
7.
5.
Item: Service accessory: Product code:
1 Module Jig MJS–9* 0750154
2 Service MBUS Cable DAU–9S 0730108
3 ACP–8 Travel Charger (see code: General Information chapter)
4 RF Antenna Cable XRF–1 0730085
5 DC Power Cable PCS–1 0730012
6 Software Protection Key PKD–1 0750018
7 Service SW diskette 3.5” for WinTesla 0774046
Service SW diskette 3.5” for NSM–3 (3D) 0774080
Flash SW packages on CD 0775219
*) The nominal operating voltage for MJS–9 is 8.0 V.
The supply voltage for MJS–9 must never exceed 15.0 V

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
Page 10 Issue 4 02/2002
Nokia Mobile Phones Ltd.
Flashing With FLA–10
3.
4.
5. 6.
7A.
8.
9.
2. 7B.
10.
11.
12.
8.
1.
13.
14.
Item: Service accessory: Product code:
1 Service Flash Adapter FLA–10 (Sales Pack) 0081346
2 Flash Loading Adapter FLA–7 0080326
3 Flash Security Box TDF–4 0770106
4 Prommer FPS–4S 0085095
5 D15 – D15 Cable AXS–5 0730091
6 Printer Cable (Included in FPS–4 sales pack) 0730029
7A D9 – D9 Cable AXS–4 0730090
(Included in FPS–4 sales pack)
7B D9 – D9 Cable AXS–4 0730090
8 DC Cable PCC–1B 0730053
9 Software protection key PKD–1 0750018
10 Service SW diskette 3.5” for NSM–3 (3D) 0774080
Service SW diskette 3.5” for WinTesla 0774046
11 Travel Charger ACH–6E (Euro) 0270381
Travel Charger ACH–6U (USA/Japan) 0270382
Travel Charger ACH–6X (UK) 0270380
12 AC Charger ACL–3E (Included in FPS–4 sales pack) 0680015
13 Service Cable XMS–3 (XCM–5 included in FLA–7 Sales Pack) 0730174
14 DC Power Cable FLC–2 (Included in FLA–10 Sales Pack) 0730012

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
Page 11
Issue 4 02/2002 Nokia Mobile Phones Ltd.
POS Flash Concept with FLA–10
1. 2.
3.
4.
5.
6.
Item: Service accessory: Product code:
1 Flash Loading Adapter FLA–10 0081346
2 Service Cable XMS–3 0730174
3 Travel Charger ACP–8 (see code: General Information chapter)
4 D9–D9 Cable AXS–4 0730090
5 POS Flash Adapter FLS–2D 0774170
6 Service SW diskette 3.5” for NSM–3 (3D) 0774080
Flash SW packages on CD 0775219

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
Page 12 Issue 4 02/2002
Nokia Mobile Phones Ltd.
Warranty Transfer
1.
1.
2.
3.
3.
DC
Item: Service accessory: Product code:
1 Flash Loading Adapter FLA–10 0081346
2 Service Cable XMS–3 0730174
3 DC Power Cable FLC–2 0730185

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
Page 13
Issue 4 02/2002 Nokia Mobile Phones Ltd.
Tuning Steps
NOTE: All RF Tunings are made in Test Jig MJS–9.
1. RX Filter Calibration
BB–filtertuningisfullyinternaloperation.Externalsignalgeneratorsetc.are
not needed, only command for phone to execute filter calibration procedure.
NOTE: RX Filter Calibration is needed when N505 has been changed.
2. RX Calibration (AGC + AFC)
Procedure
Follow the steps described in chapter ”Service Software Instructions” sec-
tion ”RX calibration... command”.
The measurement is done in five steps: 1. User is requested to put signal
generator to high input level (read from .INI file).

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
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2. Measurement with high input level is executed
3. User is requested to put signal generator to low input level (read from
.INI file).
4. Measurement with low input level is executed
5. The RX Calibration dialog will be updated when previous steps are
done.
Software reports the following:
AFC init value
AFC slope
PSW slope
Gain step values

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
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Issue 4 02/2002 Nokia Mobile Phones Ltd.
Limits for the reported values
After the calibration reported values should be approximately following:
Parameter Low limit High limit
AFC init value –200 200
AFC slope 135 345
PSW slope For information
Gain step values EGSM (nominal) PCN (nominal)
0 37 28
1 47 38
2 57 48
3 62 53
4 72 63
5 82 73
6 92 83
7 102 93
8112 103
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 frequency is close enough the wanted
frequency. This is most easiest done by measuring VCO frequency in
GSM middle channel 60 (VCO frequency is be 3788 MHz). If the devi-
ation is bigger than about +/–50 kHz it is probable that the VCTCXO is not
operating correctly.
If both of these (RSSI reading and the frequency) seem to be correct and
calibration still fails the most probable reason is that there must be some
missing gain step in Hagar or then the problem must be in Coppa.

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
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Nokia Mobile Phones Ltd.
3. AM suppression tuning
This operation is recommended when RX components have been
changed (between N505/Hagar and Z670/antenna switch).
AM suppression calibration is for tuning four Hagar parameters to get as
small RSSI value as possible.
For AM–suppression calibration external signal generator with AM–modula-
tion is needed.
Select
Am Suppression... from Tuning menu.
Signal generator setup:
AM–modulation, fmod = 1 kHz, mod. depth = 83%
f = ch(default)+10 MHz,
P = –23 dBm (EGSM)
P = –26 dBm (PCN)
Press
Measure button.
Press OK button.

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
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Issue 4 02/2002 Nokia Mobile Phones Ltd.
Test limits for AM–calibr. results:
–86 dBm (EGSM)
–95 dBm (PCN)
Press
Save button to save the values.
NOTE: AM suppression calibration is needed for the PCN band as well.
To change the band go to
Product Menu and select Band , PCN.

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
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4. Alignment of Transmitter Power Levels
Equipment:
Pulsed power meter or spectrum analyzer and 10 dB attenuator. Voltage
source set to 3.6 V.
The following settings for the spectrum analyzer are recommended when
aligning the power levels: zero span, resolution and video bandwidths 1
MHz, input attenuation 40 dB, sweep time 1 ms, video triggering.
NOTE! If spectrum analyzer is used in power level alignment the reading
needs to be calibrated with a power meter after every power up. Check
also the source voltage during TX burst with oscilloscope and use big
enough capacitor.
Procedure:
NOTE: Make sure you are working with GSM900 band. First tune power
levels 5, 15 and 19. Then Calculate the other levels and save the values.
After this switch to PCN band and do the tuning to levels 0, 11 and 15. (To
change the band go to
Product Menu and select Band , PCN). Then Cal-
culate the other levels and save the values.
GSM900 TX Power Tuning dialog:

NSM–3/3D
Tuning Instructions
PAMS Technical Documentation
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Issue 4 02/2002 Nokia Mobile Phones Ltd.
GSM1800 TX Power Tuning dialog:
5. I/Q Modulator Alignments
I/Q modulator alignments has to performed in both bands. See chapter
”Service Software Instructions” and section ”TX I/Q... command” for fur-
ther information.
–67.71 kHz +67.71 kHz
CHF
> 30 dB > 35 dB
Set this value
to minimum
Amplitude &
phase difference:
Set this value
to minimum
D.C. offset
tunings:

NSM–3/3D
Tuning Instructions PAMS Technical Documentation
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Procedure:
Connect the spectrum analyzer to the phone antenna connector. The rec-
ommended spectrum analyzer settings are: span 200 kHz, resolution BW
10 kHz, video BW 1 kHz, sweep 500 ms, input attenuation 30 dB.
– From
RF controls menu make sure that TX data type is 1.
– Go to
TX I/Q tuning menu. The alignment channel for EGSM is 60
(902 MHz) and for PCN is 700 (1747.8 MHz).
– Select the ”TX I DC offset” option and adjust the level of the centre fre-
quency (CHF) to minimum.
– Select the ”TX Q DC offset” option and adjust the level of the CHF
again to minimum.
– After finding both minima change ”TX I DC offset” by step or two from
the current value to both directions to see, whether better minimum
can be found for CHF.
– Select the ”Amplitude Difference” option and adjust the level of the un-
wanted sideband CHF + 67.71 kHz to minimum.
– Select the ”Phase Difference” option and dajust the level of CHF +
67.71 kHz again to minimum.
– After all the minima have been found press ”Save” button to store the
values to phone EEPROM.
Targets:
The level of the centre frequency CHF should be at least 30 dB down to
the wanted sideband CHF - 67.71 kHz.
The level of the unwanted sideband CHF + 67.71 kHz should be at least
35 dB down to the wanted sideband CHF - 67.71 kHz.