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
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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.
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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
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THF–10/11
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–10/11 to the modular T–connector by using cable from test
frame SCS–4B (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.
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Tuning Instructions
Technical Documentation
Equipment Setup for Tuning a Phone without Removing Covers
Item: Service accessory: Product code:
1 Service test cable (SCS–4B) 0730087
2 Audio cable, ADS–1 0730011
3 Modular T–connector 4626134
4 Modular cable, XCM–1 4626131
5 Modular power connector, SCF–6 0770036
6 RS–232 adapter (9 pin to 25 pin) 4626170
7 PC/M2BUS adapter, DAU–2 0750006
8 Service SW diskette 3.5” 0774019
8 Service SW diskette 5.25” 0774018
9 Software protection key PKD–1 ”dongle” 0750018
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Technical Documentation
Starting the Program
Pclocals service software is delivered on a diskette and is copy protected
with a dongle PKD–1. The dongle must be present in the parallel port
when using the software. Pclocals software can be started directly from
the diskette. If you want to store the program to the hard disk, proceed
according to instructions given in Section 5.
The software is started with the command THF7SERV <Enter>
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.
Tuning Instructions
If you do not want to use phone country version dependent tuning channels, proceed as follows:
1. Choose Edit from the File menu
2. Change channel values
3. Choose Save from the file menu
The program saves the channel settings as ”default.set” and uses them
every time when Tunings or Testing menu is chosen. If ”default.set” is not
found, the program uses ordinary channels depending on the phone
country version. On the other hand, if the ”default.set” is determined then
the program uses those default channels and pays no attention to the
phone country version! If you have problems with channels, then create
the ”default.set” file. If you want to stop using ”default.set” file, delete it
from the hard disk.
Default channels in Edit dialog: Using:
Channel low for 1 band phones Afc and afc–limits tuning, basic settings
Channel mid for 1 band phones Afc and afc–limits tuning, basic settings
Channel high for 1 band phones Afc and afc–limits tuning, basic settings
Channel low for 2 band phones Afc and afc–limits tuning, basic settings
Channel mid for 2 band phones Afc and afc–limits tuning, basic settings
Channel high for 2 band phones Afc and afc–limits tuning, basic settings
Rssi channel low band 1 Rssi ch compensation
Rssi channel mid band 1 Rssi ch compensation,
Rssi levels and agc (1 band phones)
Rssi channel high band 1 Rssi ch compensation
Rssi channel low band 2 Rssi ch compensation
Rssi channel mid band 2 Rssi ch compensation
Rssi channel high band 2 Rssi ch compensation
Rssi mid ch for 2 band phones Rssi levels and agc (2 band phones)
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Tuning Instructions
Tunings menu
1 – AFC Tuning
This dialog box is used for adjusting frequency for the phone middle
channel.
The phone is turned to the default middle channel (RX and TX) and transmitter is activated.
Note: Temperature during tuning should be approx. +25 °C.
AFC programming:
– Select Service/Tunings/AFC frequency tuning
– Measurement device shows the AFC frequency D/A converter reading.
– Proceed with tuning until the value is within the middle TX frequency ±
0.3 kHz.
Technical Documentation
– Use the arrow and page up/down keys or mouse to change the value
and ALT–S to write the value to EEPROM. The same control keys are
used in TX Power Level, Deviation and AFC Limits tunings.
2 – AFC Limits Tuning
The progam asks to set the right RF–generator frequencies and signal
levels. It calculates the IF counter value. Use the arrow and page up/
down keys or mouse to change upper and lower limit values (TX frequency +2.0 kHz and TX–frequency –2.0 kHz) and press ALT–S to write the
values to EEPROM.
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Technical Documentation
3 – RSSI Tuning
Reference values for the received signal strength measurement are also
tuned with Pclocals. Adjustment is carried out with the help of an external
signal generator. The program reads A/D converter values after the user
has set the desired level to the signal generator.
RSSI programming:
– Select Service/Tunings/RSSI Tuning
– Program reads value given by A/D converter for received signal
– Program goes through three tuning points for channel compensation
– Program goes through five tuning points shown in the table below, then
returns to main menu
– THF–10/11 has tuning point for –83 dBm level.
Tuning RF signal Level no
point level
Tuning Instructions
1 –58 dBm 5
2 –68 dBm 4
3 –93 dBm 3
4 –103 dBm 2
5 –115 dBm 1
AGC programming:
– Program asks to set the RF signal levels
– Program shows the AGC on and AGC off levels
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Tuning Instructions
4 – Deviation Tuning
Deviation tuning procedure:
– Connect devices and set measurement device values according to info
texts.
– Select Service/Tunings/deviation tuning
– Use the arrow keys or mouse to change tuning values and ALT–S to
write them to the phone.
– Compare measurement device value to the program info text value.
– Proceed until the above values are equal.
FFSK Deviation Tuning
This adjustment is used to set outgoing FFSK data deviation.
The command turns the phone to default middle channel (RX and TX),
activates the transmitter, opens the data path, and sets up the modem to
send a continuous 1800 Hz, ”0” signal.
Technical Documentation
To adjust, give some values (0–15) for the D/A converter, and compare
results to the reading given by the deviation meter.
Nominal Deviation Tuning
The purpose of this tuning operation is to adjust the nominal deviation of
voice and DTMF signaling.
The command turns the phone to the default center channel, and activates the transmitter.
To adjust, enter values from the range 0–7 into the D/A converter and
compare results with deviation meter readings.
Maximum Deviation Tuning
This adjustment has an effect on voice and DTMF signal maximum deviation.
The command turns the phone on the default center channel, and activates the transmitter.
Enter various values from the range 0–7 into the D/A converter, and
compare results with the reading in the deviation meter.
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Note: Deviation will increase when D/A reading is decreased.
Original 12/97
PAMS
THF–10/11
Technical Documentation
Phi Signal Deviation Tuning
The purpose of this adjustment is to adjust $ signal (SAT) deviation.
The command turns the phone on the default center channel (RX and
TX), activates transmitter, and enables the φ loop.
To adjust, enter a few values (0–15) to the D/A converter and
compare changes to deviation meter readings.
5 – TX Output Power Tuning
This adjustment writes the power levels of the phone transmitter into the
EEPROM. When doing this, a power meter must be used. THF–10/11 has
three power levels to tune. Power levels low and middle are adjusted only
at band 3. Power level high is tuned at all four bands.
Tuning Instructions
Programming can be interrupted when necessary by pressing Esc key.
Power levels tuning procedure:
– Connect power meter to the antenna connector of the phone.
– Adjust the phone supply voltage to +6.5 V !
– Select Service/TX output power
– Use the arrow keys, Page up/down keys or mouse to change the tuning
value.
– Change tuning value until the power meter value is at the target value.
– Use TAB key to change field and ALT–S to write values to EEPROM.
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Tuning Instructions
8 – Battery Voltage Tuning
A reference value for battery voltage is set by using an accurate 6.0 V
supply.
Battery voltage tuning procedure:
– Connect SCS–4B to the phone, and set supply voltage to 6.0 V.
– Select Service/Tunings/Battery voltage tuning
– The program reads the 6.0 V, A/D reading fed to VBAT line.
– set the supply voltae to 8.2 V
– The program reads the 8.2 V A/D reading fed to the Lithium VBAT line.
9 – Charger Voltage Tuning
The reference value for the charge voltage is adjusted by using an accurate 6.0 V power supply.
Technical Documentation
Charger voltage tuning procedure:
– Connect modular power connector SCF–6 to modular T–Adapter.
– Select Service/Tunings/Charger voltage tuning
– Program reads 6.0 V, A/D reading fed to phone VCHARG line.
10 – Tuning Values & Defaults
This dialog box enables reading of the phone tuning parameters, and
writing of the default values.
Note: Spare modules received from the factory are factory–tuned.
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