Nokia 450 TUNING INSTRUCTIONS
After Sales Technical Documentation
THF–9 Series Transceivers
Tuning Instructions
Original 43/96
NMP Part No. 0275269
THF–9
After Sales
Tuning Instructions
CONTENTS
Tuning Instructions – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Equipment – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Setup – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Setup for Tuning a Phone without Removing Covers – 6. . . . .
Equipment Setup for Tuning a Phone with Covers Removed – 7
Starting the Program – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Tuning Steps – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tunings menu – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 – AFC Tuning – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 – AFC Limits Tuning – 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 – RSSI and AGC Tuning – 10. . . . . . . . . . . . . . . . . . . . . . . . . . .
4 – Deviation Tuning – 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FFSK Deviation Tuning – 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Deviation Tuning – 11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Deviation Tuning – 11. . . . . . . . . . . . . . . . . . . . . . . . . .
Phi Signal Deviation Tuning – 12. . . . . . . . . . . . . . . . . . . . . . . . .
5 – TX Output Power Tuning – 12. . . . . . . . . . . . . . . . . . . . . . . . .
8 – Battery Voltage Tuning – 13. . . . . . . . . . . . . . . . . . . . . . . . . .
9 – Charger Voltage Tuning – 13. . . . . . . . . . . . . . . . . . . . . . . . . .
10 – Tuning Values & Defaults – 13. . . . . . . . . . . . . . . . . . . . . . .
Technical Documentation
Page – 2
Original 43/96
After Sales
THF–9
Technical Documentation
Tuning Instructions
General
All tunings of the THF–9 phones can be carried out with Service Software. This program turns the phone into the local mode, enabling control
of the phone over the external M2BUS interface.
Tuning of the THF–9 is based on the Service Software communicating
with the D/A and A/D converters of the phone. In a few instances, the
phone also calculates the required correction parameter. The tuning values of the phone reside in the EEPROM.
The program recognizes the phone hardware version and shows correct
frequencies and channels that should be used when tuning the phone.
When you are doing tuning steps the software searches for ”default.set”
file. If it does not exist, the program uses default channels depending on
the phone harware or country version.
Tuning Instructions
When tuning fields are tuned, write new values to the phone by pressing
ALT–S. Program asks ”Write data to phone?”, default is ”NO”.
Note: Tunings have to be done by using an accurate 6.5 V supply.
The reference values for battery and charge voltage are set by using
a 6.0 V supply.
CAUTION
During tuning, proceed as follows:
– Take care not to damage sensitive measuring instruments by using too
much RF power.
– Carry out all tuning steps as quickly as possible to avoid excessive heat
buildup on the RF unit.
– Carry out the tuning steps in the order given.
– Never attempt to tune out a defect!
– Consider the info texts.
Original 43/96
Page – 3
THF–9
After Sales
Tuning Instructions
Required Equipment
– At least 80386 computer with Pclocals software; see Sect. 5 for intruc-
tions on installation and use.
– M2BUS adapter DAU–2 and other service accessories; see equipment
setup pictures.
– Multimeter or DVM.
– Power supply
– DUPLEX radio telephone test station or separate measuring equip-
ment as follows:
– frequency counter (± 0.8 ppm)
– RF generator
– modulation analyzer
– attenuator
Technical Documentation
– AF generator
– power meter
– branching unit
– SINAD meter
Page – 4
Original 43/96
After Sales
THF–9
Technical Documentation
Equipment Setup
Turn off the computer before connecting to avoid possible damage to the
serial port.
Connect the M2BUS adapter (DAU–2, item 7) to the serial port (25–pin
male D–connector). In case your PC (as AT types in general) has a 9–pin
serial port use the special connector adapter cable provided (item 6).
Then connect the modular cable XCM–1 (item 4) from the M2BUS adapter to the modular T–connector (item 3).
Then connect the modular cable XCM–1 (item 4) trom the first modular
T–connector to the second modular T–connector. Now connect the transceiver THF–9 to the modular T–connector by using cable from test frame
JBS–8 (item 1).
Then connect external audio lines to the measurement station by using
the audio cable ADS–1 (item 2).
Connect modular power connector SCF–6 (item 5) to the modular T–connector. the supply voltage must be set to 6.5 V, when the phone is tuned.
Tuning Instructions
For transmit and audio measuring and adjustment connect EAR/MIC
breakout cable ADS–1 as follows:
– EAR line to test equipment (Marconi 2960) AF INPUT
– MIC line to test equipment (Marconi 2955) AF GEN OUTPUT
Do not disconnect short coaxial jumpers between 2955/2960.
Note: The supply voltage must be set to 6.0 V, when battery and
charger referencies are tuned. Use of Service box JBS–7 is not
recommended.
Original 43/96
Page – 5
Loading...