PAMS Technical Documentation
TFE–1 TUNING
INSTRUCTIONS
Original 09/97
TFE–1
PAMS
Tuning Instructions
Amendment
Number
Technical Documentation
AMENDMENT RECORD SHEET
Date Inserted By Comments
Page 2
Original 09/97
PAMS
TFE–1
Technical Documentation
TUNING INSTRUCTIONS
Contents
Introduction Page 4
General Page 4
Required Equipment Page 5
Equipment Setup Page 5
Equipment Setup for Tuning a Phone without Removing Covers Page 6
Equipment Setup for Tuning a Phone with Removing Covers Page 7
Starting The Software Page 9
Tuning Steps Page 10
1. RSSI Reference Signal Level Storage Page 10
2. AFC Diagram Storage Page 10
3. I/Q Modulator Amplitude Balance and Phase Shift Tuning Page 11
4. Tuning of Transmitter Power Levels Page 13
Tuning Instructions
Original 09/97
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TFE–1
PAMS
Tuning Instructions
Introduction
General
In contrast to earlier second–generation analog cellular phones almost all tuning operations of the TFE–1 are carried out using the service software. The service software turns the phone into the locals mode, in which the phone can be
outwardly controlled via the M2BUS 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.
Technical Documentation
N.B. During tuning, proceed as follows:
– Take care not to damage sensitive measuring instruments with excessive
RF power.
– Carry out all tuning steps in the shortest possible time 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!
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Original 09/97
PAMS
TFE–1
Technical Documentation
Required Equipment
– PC/AT computer with service software; see Sect. 5 for instructions on instal-
lation and use.
– M2BUS adapter DAU–4S and other service accessories; see equipment set-
up pictures.
– Multimeter or DVM.
– GSM radio telephone test station or separate measuring equipment as fol-
lows:
– RF generator
– pulse power meter
– spectrum analyzer
– attenuator and branching unit
Equipment Setup
Tuning Instructions
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, attach the DAU–2T PC/MBUS adapter to the PC serial port, using an
RS–232 9–pin to 25–pin adapter if necessary. Attach one end of the modular
cable XCM–1 to DAU–2T, and the other end to the system connector with the
help of the sevice adaptor AFW–2.
The RF cable should be connected between the RF connector of the test set
and the Antenna 1 connector on TFE–1 with the help of a Mini UHF/BNC
adapter. When the phone covers are removed the RF connection on the extension cable should be used instead.
For audio measurements, connect the service cable, ADS–1, as follows:
– EAR line to AF INPUT of test equipment
– MIC line to MOD GEN OUTPUT of test equipment
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Tuning Instructions
Technical Documentation
Equipment Setup for Tuning a Phone without Removing Cover
3.
2.
1.
5.
6.
9.
7.
4.
10.
8.
Item: Service accessory: Product code:
1. Audio test cable, ADS–1 0730011
2. Modular cable, XCM–1 4626131
3. Service adapter, AFW–2 0750110
4. RF cable (not supplied)
Mini UHF/BNC Adapter 0198551
5. Power supply cable, PCS–1 0730012
6. Modular T–connector 4626134
7. Modular cable, XCM–1 4626131
8. PC/MBUS adapter, DAU–2T 0750006
9. RS–232 adapter (9 pin to 25 pin) 4626170
Page 6
10. Service software diskette 3.5”, 0774052
– Service software diskette 5.1/4” 0774053
– PKD SW Security Device 0750018
Original 09/97
PAMS
TFE–1
Technical Documentation
Tuning Instructions
Equipment Setup for Tuning a Phone with Cover Removed
3.
2.
1.
5.
6.
4.
10.
9.
7.
8.
Item: Service accessory: Product code:
1. Audio test cable, ADS–1 0730011
2. Modular cable, XCM–1 4626131
3. Service adapter, AFW–2 0750110
4. RF cable (not supplied)
Mini UHF/BNC Adapter 0198551
5. Power supply cable, PCS–1 0730012
6. Modular T–connector 4626134
7. Modular cable, XCM–1 4626131
8. PC/MBUS adapter, DAU–2T 0750006
9. RS–232 adapter (9 pin to 25 pin) 4626170
10. Service software diskette 3.5”, 0774052
– Service software diskette 5.1/4” 0774053
– PKD SW Security Device 0750018
Original 09/97
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TFE–1
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Tuning Instructions
Flash Prommer
6.
9.
Technical Documentation
1.
4.
2.
5.
3.
7.
8.
Item: Service accessory: Product code:
1. Service adapter, AFW–2 0750110
2. Cable, AXS–5 0730091
3. Power supply cable, PCS–1 0730012
4. Cable 0730029
5. Cable 0730090
6. Charger, ACW–2 0675123
7. AC/DC Adapter ACL–3E 0680020
8. Flash prommer, FPS–4 0750090
9. Service software diskette 3.5”, 0774052
– Service software diskette 5.1/4” 0774053
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Technical Documentation
Starting The Software
The software is delivered on a diskette and is copy protected with a dongle.
The software must be installed on the hard disk, see installation instructions in
Service Software User’s Guide.
Starting steps:
– Start Windows
– Open NMP Service Software Group
– Start software by double–clicking the WinTesla Service PCLocals icon
– When Login windows appears enter user ID, OK, press CANCEL button,
– Choose from main menu
Tuning Instructions
Product –> New.
Original 09/97
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TFE–1
PAMS
Tuning Instructions
Tuning Steps
1. RSSI Reference Signal Level Storage
Reference value for the received signal strength meter are program tuned.
RSSI reference signal level programming:
– Select
– Connect RF generator to antenna connector at 947.06771 MHz.
– Adjust signal generator level to –80 dBm + cable attenuation.
– Press
– Adjust signal generator level to –55 dBm + cable attenuation.
– Press
– Values should be below ±3.0 dB.
– Press
Tuning –> RSSI (AGC)...
OK
button
OK
button.
OK
button.
.
Technical Documentation
2. AFC Diagram Storage
This tuning is used to calibrate the automatic frequency control range.
AFC tuning:
– Select
– Set RF generator frequency 947.06771 MHz at level –55 dBm + cable at-
tenuation.
– Check that ”Cont. mode channel” is 60
– The measurement result should be;
– Press
Tuning –> AFC...
• Low over < –20 kHz
• Middle ±3.0 kHz (depends on generator frequency accuracy)
• High below > 20 kHz
OK
button.
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Technical Documentation
Tuning Instructions
3. I/Q Modulator Amplitude Balance and Phase Shift Tuning
The purpose of this tuning operation is to adjust the I/Q modulator d.c. offsets
and the I/Q modulator amplitude balance and phase shift.
I/Q modulator d.c. offsets, amplitude balance and phase shift tuning:
– Select
– Select I/Q tuning values from PC’s memory, phone’s EEPROM or factory de-
fault values.
– Connect spectrum analyzer (with attenuator if needed) to phone antenna
connector.
– Check that TX power level is level 15, Cont. mode 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.
Tuning –> TX I/Q...
–67.71 kHz +67.71 kHz
CHF
D.C. offset
tunings:
Set this value
to minimum
> 30 dB
> 35 dB
Amplitude &
phase difference:
Set this value
to minimum
– Select option ”TX I d.c. offset”.
– Adjust the level of centre frequency (CHF signal) to minimum by varying 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
Original 09/97
with
<–
and
–>
keys.
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TFE–1
PAMS
Tuning Instructions
– Select option ”Tune Amplitude Difference”.
– Adjust the level of signal CHF+67.7 kHz to minimum by varying D/A convert-
er value with <– and –> keys.
– The amplitude difference between CHF+67.7 kHz and CHF–67 kHz should
be >35 dB.
– Select option ”Tune Phase Difference”.
– Adjust the level of signal CHF+67.7 kHz to minimum by varying D/A convert-
er value with <– and –> keys.
– When values are correct press
OK
Technical Documentation
button.
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Technical Documentation
4. Tuning of Transmitter Power Levels
This adjustment loads the power levels of the phone transmitter into the EEPROM. When doing this, a pulse power meter or spectrum analyzer must be
used.
Power levels programming:
– Select
– Select I/Q tuning values from PC’s memory, phone’s EEPROM or factory de-
fault values.
– Set power supply voltage to 6.8 V.
– Connect pulse power meter or spectrum analyzer to antenna connector.
– Check that continuous mode channel 700.
– Adjust the power level (levels 0, 8 and 10) with + and – buttons and change
levels with ↑
Power
level
Tuning –> TX Power...
and ↓ keys.
Tuning P
(VB=6.0 V, CH60)
OUT
/dBm
Tuning Instructions
5 33
13 17
15 13
– Press
– Once all TX levels are correct, press
Calculate
button to calculate all other levels.
OK
button.
Original 09/97
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Tuning Instructions
Technical Documentation
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