The tuning operations of the THF-12 are carried out using the Service
Software. The Service Software program turns the phone into Locals
Mode, in which the phone can be outwardly controlled via the M2BUS in-
terface.
Tuning is based on the Service Software communicating with the D/A and
A/D converters of the phone.
The calibration data of the phone resides on the EEPROM. The contents
of the EEPROM can be read by the Service Software. The program also
enables writing of the factory preset calibration data to the EEPROM, af-
ter which the whole tuning process should be carried out again.
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 fol-
lowing section and using th on–screen help menus as a guide. Spare sys-
tem modules will be delivered pre–tuned from the factory and will not re-
quire retuning.
Technical Documentation
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!
Minimum Required Servicing Equipment
–PC/AT Computer with Service Software installed: See Service Software
instructions.
–M2BUS cable DAU–9P and other service software accessories; see
equipment set–up pictures.
–Audio analyzer.
–RF power meter, power measurement sensitivity –10 dBm.
–RF generator.
–Device to provide specified test modulation to modulate RF generator.
–Multimeter or DVM.
–Attenuator and branching unit.
–Power supply, nom. voltage 3.6 V (with service battery BBD–3 voltage
is 8.2 V).
Equipment Setup
Turn off the computer before connecting the cable to avoid possible damage to the serial port.
Page 4
Issue 3 02/2000
PAMS
THF-12
Technical Documentation
Caution:Do not connect the PKD–1 to the serial port. This could damage
the PKD–1 !
Connect the MBUS cable SCH–5 to the phone. Connect 9–pin male
D–connector in your PC serial port.
For transmit, audio measuring and adjustment connect ADS–1 EAR/MIC
breakout cables as follows:
– EAR line to test equipment AF INPUT
– MIC line to test equipment AF GEN OUTPUT
Connect BBD–3 service battery connectors to the power supply. Supplyvoltage should be set to 8.2 V.
Tuning and Flashing Instructions
Issue 3 02/2000
Page 5
THF-12
PAMS
Tuning and Flashing Instructions
Technical Documentation
Equipment Setup For Tuning A Phone Without Removing
Covers
4.
8.
7.
1.
+8.2 V
2.
3.
ItemService AccessoryTypeCode
1 Service Battery BBD–30775071
2 DC cable SCB–30730114
3 Service Cable SCH-50730098
4 Software protection key PKD-10750018
5 Service Software diskette 3.5” 0774112
6 Audio Cable ADS-10730011
7 Service MBUS Cable DAU–9S0730108
8 Antenna Cable XRC–1B0730128
9Modular T-Connector 4626134
10WinTesla Diskette 3,5”0774071
altDongle Drivers for Win 3.1x, 95 and NT
(combined 16bit, 32bit)0770137
5.
6.
9.
Page 6
Issue 3 02/2000
PAMS
THF-12
Technical Documentation
Tuning and Flashing Instructions
Equipment Setup For Tuning A Phone With Covers Removed
+3.6V
8.
3.
4.
9.
1.
6.
3.6V
5.
2.
Item: Service accessory: Type Code:
1 Test frame *JBS–24 0770167
2 Modular T-Connector 4626134
3DC Cable PCS–10730012
4Antenna Cable XRC–1B0730128
5 Service Cable SCH-50730098
6Service MBUS Cable DAU–9S0730108
7 Audio Cable ADS-10730011
8 Software protection key PKD-10750018
9WinTesla Diskette 3,5”0774071
altDongle Drivers for Win 3.1x, 95 and NT
(combined 16bit, 32bit)0770137
7.
*)The nominal operating voltage for the JBS is 3.6 V.
Issue 3 02/2000
Page 7
THF-12
PAMS
Tuning and Flashing Instructions
Manual Tuning Steps
General
If any repairs or replacements have not been made, manual tuning is not
necessary on the phone. Spare modules have been tuned at the factory.
If some repair or replacements have been made, manual tuning is nessessary.
If you do not want to use phone country version dependent tuning channels, proceed as follows:
1. Choose RF controls from the Configure menu.
2. Change channel values.
3. Choose Write File –button in order to save channel values in ” TESLA.ini ” –file.
Technical Documentation
The program saves the channel settings and uses them every time when
Tunings or Testing menu is chosen. The program uses ordinary channels
depending on the phone country version, if you don’t change channels.
Default channels in RF–controls
dialog
Using
Channel low for 1 band phonesAfc and afc–limits tuning, basic settings
Channel mid for 1 band phonesAfc and afc–limits tuning, basic settings
Channel high for 1 band phonesAfc and afc–limits tuning, basic settings
Channel low for 2 band phonesAfc and afc–limits tuning, basic settings
Channel mid for 2 band phonesAfc and afc–limits tuning, basic settings
Channel high for 2 band phonesAfc and afc–limits tuning, basic settings
Rssi channel low band 1Rssi ch compensation
Rssi channel mid band 1Rssi ch compensation
Rssi levels and agc (1 band phones)
Rssi channel high band 1Rssi ch compensation
Rssi channel low band 2Rssi ch compensation
Page 8
Rssi channel mid band 2Rssi ch compensation
Rssi channel high band 2Rssi ch compensation
Rssi mid ch for 2 band phonesRssi levels and agc (2 band phones)
Issue 3 02/2000
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