Nokia 550 TUNING INSTRUCTIONS
PAMS Technical Documentation
THF–10/11 Series Transceivers
Tuning Instructions
Original 12/97
THF–10/11
PAMS
Tuning Instructions
CONTENTS
Tuning Instructions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Equipment 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Setup 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Setup for Tuning a Phone without Removing Covers 6
Starting the Program 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Tuning Steps 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tunings menu 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 – AFC Tuning 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 – AFC Limits Tuning 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 – RSSI Tuning 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 – Deviation Tuning 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FFSK Deviation Tuning 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Deviation Tuning 10. . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Deviation Tuning 10. . . . . . . . . . . . . . . . . . . . . . . . . .
Phi Signal Deviation Tuning 11. . . . . . . . . . . . . . . . . . . . . . . . .
5 – TX Output Power Tuning 11. . . . . . . . . . . . . . . . . . . . . . . . .
8 – Battery Voltage Tuning 12. . . . . . . . . . . . . . . . . . . . . . . . . .
9 – Charger Voltage Tuning 12. . . . . . . . . . . . . . . . . . . . . . . . . .
10 – Tuning Values & Defaults 12. . . . . . . . . . . . . . . . . . . . . . .
Technical Documentation
Page 2
Original 12/97
PAMS
THF–10/11
Technical Documentation
Tuning Instructions
General
All tunings of the THF–10/11 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–10/11 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 12/97
Page 3
THF–10/11
PAMS
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 12/97
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