Nokia NSE-6 SERIES User manual

NSE–6 Series Transceivers
PAMS Technical Documentation
Original 08/98
Tuning Instructions

PAMS
Technical Documentation
NSE–6
Tuning Instructions
Page 2 Original 08/98
CONTENTS
Tuning Instructions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Equipment 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Setup 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flash Concept for NSE–6 5. . . . . . . . . . . . . . . . . . . . . . . . . . .
Tuning with Test–frame MJS–6 6. . . . . . . . . . . . . . . . . . . . . . .
Testing With Covers On – using Service Box JBU–5 7. . . .
Tuning Steps 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. RX Calibration (AGC + AFC) 8. . . . . . . . . . . . . . . . . . . . . .
2. I/Q Modulator Amplitude Balance and Phase Shift Tuning 9
3. Tuning of Transmitter Power Levels 11. . . . . . . . . . . . . . . .
4. Energy Management Calibration 12. . . . . . . . . . . . . . . . . . .

PAMS
Technical Documentation
NSE–6
Tuning Instructions
Page 3
Original 08/98
Tuning Instructions
General
All tuning operations of the NSE–6 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
NSE–6
Tuning Instructions
Page 4 Original 08/98
Required Equipment
– PC/AT computer 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, 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
NSE–6
Tuning Instructions
Page 5
Original 08/98
Flash Concept for NSE–6
12.
1.
2.
3.
4.
5.
6.
7.
14.
8.
10.
11.
13.
15.
9.
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 Box JBU–5 0770120
5 DC Cable PCS–1 0730012
6 Service Cable XCM–5 0730142
7 DC Cable PCC–1B 0730053
8 Printer Cable (Included in FPS–4 sales pack) 0730029
9 D15 – D15 Cable AXS–5 (FLA–5 sales pack) 0730091
10 D9 – D9 Cable AXS–4 0730090
(Included in FPS–4 sales pack)
11 D9 – D9 Cable AXS–4 0730090
12 Software protection key PKD–1 0750018
13 Service SW diskette 3.5” for NSE–6 0774080
Service SW diskette 3.5” for WinTesla 0774046
14 Travel Charger ACH–6E (Euro) 0270381
Travel Charger ACH–6U (USA/Japan) 0270382
Travel Charger ACH–6X (UK) 0270380
15 AC Charger ACL–3E 0680015
(Included in FPS–4 sales pack)

PAMS
Technical Documentation
NSE–6
Tuning Instructions
Page 6 Original 08/98
Tuning with Test–frame MJS–6
1.
2.
3.
4.
5.
6.
7.
9.
8.
Item: Service accessory: Product code:
1 Module Jig MJS–6 * 0770121
2 Service Audio Box JBA–4 0770094
3 Travel Charger ACH–7E (Euro) 0675144
Travel Charger ACH–7U (USA/Japan) 0675143
Travel Charger ACH–7X (UK) 0675145
4 Service Cable XCM–5 0730142
5 Service MBUS Cable DAU–9S 0730108
6 Audio Cable ADS–1 0730011
7 Software Protection Key PKD–1 0750018
8 Audio Cable ADS–1 0750018
9 Service SW diskette 3.5” for NSE–6 0774080
Service SW diskette 3,5” for WinTesla 0774046
*) The nominal operating voltage for MJS–6 is 3.6 V.
The supply voltage for MJS–6 must never exceed 5.0 V

PAMS
Technical Documentation
NSE–6
Tuning Instructions
Page 7
Original 08/98
Testing With Covers On – using Service Box JBU–5
1.
2.
3.
4.
5.
6.
7.
8.
10.
9.
Item: Service accessory: Product code:
1 Service Box JBU–5 0770120
2 Service Audio Box JBA–4 ** 0770094
3 DC Cable PCS–1 0730012
4 DC Cable SCB–3 for Service Box 0730114
5 Service Cable XCM–5 0730142
6 Audio Cable ADS–1 0730011
7 Service MBUS Cable DAU–9S ** 0730108
8 Software Protection Key PKD–1 0750018
9 Audio Cable SCA–5 0730136
10 Service SW diskette 3.5” for NSE–6 0774080
Service SW diskette 3.5” for WinTesla 0774046
*) The nominal operating voltage for JBU–5 is 3.6 V.
The supply voltage for JBU–5 must never exceed 5.0 V

PAMS
Technical Documentation
NSE–6
Tuning Instructions
Page 8 Original 08/98
Tuning Steps
1. RX Calibration (AGC + AFC)
Reference values for the received signal strength meter are program
tuned.
RSSI reference signal level programming:
– Select Tuning –> RX Calibration
– Connect RF generator to service jig antenna connector at 947.067710
MHz.
– Adjust signal generator level to –55 dBm + cable attenuation.
– Press
OK button
– Adjust signal generator level to –80 dBm + cable attenuation.
– Press
OK button.
Service software reports:
A Table of AFC Parameters:
AFC INIT Value
AFC Slope
PSW Slope
A Table for AGC Calibration:
AGC in 3 db steps 0...57 dB
DAC and voltage reading for each gain value
– Press
SAVE button

PAMS
Technical Documentation
NSE–6
Tuning Instructions
Page 9
Original 08/98
2. I/Q Modulator Amplitude Balance and Phase Shift Tuning
The purpose of this tuning operation is to adjust the I/Q modulator d.c. off-
sets and the I/Q modulator amplitude balance and phase shift.
I/Q modulator d.c. offsets, amplitude balance and phase shift tuning:
– Select Tuning –> TX I/Q...
– Select I/Q tuning values from PC’s memory, phone’s EEPROM or fac-
tory default values.
– Connect spectrum analyzer (with attenuator if needed) to service jig
antenna connector.
– Check that TX power level is level 10, channel is 60 and TX data type
is 1.
– Adjust spectrum analyzer centre frequency to 902 MHz, Span 200
kHz, Res BW 10 kHz, Video BW 1 kHz and Sweep time 0.5 s.
–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:
– Select the ”TX I d.c. offset” option.
– Adjust the level of centre frequency (CHF signal) to minimum by vary-
ing D/A converter value with
<– and –> buttons.
– The amplitude difference between CHF–67.7 kHz and CHF should be
>30 dB.
– Select option ”TX Q d.c. offset”.
– Adjust the level of signal CHF to minimum by varying D/A converter
value with
<– and –> keys.

PAMS
Technical Documentation
NSE–6
Tuning Instructions
Page 10 Original 08/98
– Use the ”Amplitude Difference” option.
– Adjust the level of signal CHF+67.7 kHz (902.06777 MHz) to minimum
by varying D/A converter value with <– and –> keys.
– The amplitude difference between CHF+67.7 kHz and CHF–67 kHz
should be >35 dB.
– Select the ”Phase Difference” option.
– Adjust the level of signal CHF+67.7 kHz to minimum by varying D/A
converter value with <– and –> keys.
– When values are correct press
SAVE button.