Nokia NME-2A Series Manuel utilisateur
Programmes After Market Services (P.A.M.S.)
NME–2A SeriesTransceivers
Technical Documentation
Issue 2 05/2000
Tuning Instructions
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 2 Issue 2 05/2000
AMENDMENT RECORD SHEET
Amendment
Number Date Inserted By Comments
08/97 Original
Issue 2 02/2000 OJuntune ARS added
Fig. p.7, p.8 updated
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 3
Issue 2 05/2000
Contents
Page No
General 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Equipment 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Setup 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting The Program 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting options for PCLocals service software 9. . . . . . . . . . . . . . . . . . . .
Tuning Steps 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. RSSI Reference Signal Level Storage 10. . . . . . . . . . . . . . . . . . . . . . . . .
2. AFC Diagram Storage 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. I/Q Modulator Amplitude Balance and Phase Shift Tuning 11. . . . . . . .
4. Tuning of Transmitter Power Levels 13. . . . . . . . . . . . . . . . . . . . . . . . . . .
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 4 Issue 2 05/2000
List of Figures
Page No
Figure 1. Equipment setup with Audio Test Box -Tuning 7. . . . . . . . . . . . . .
Figure 2. Equipment setup without Audio Test Box - Tuning 8. . . . . . . . . .
Figure 3. Amplitude Balance /Phase Shift Graph 11. . . . . . . . . . . . . . . . . . .
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 5
Issue 2 05/2000
General
Most of the tuning are done with help of the PCLocals software. The
PCLocals program turns the phone into the Locals mode, in which the
phone can be outwardly controlled via the M2BUS interface.
Tuning is based on the PCLocals 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 PCLocals program 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.
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 following
section and using the on-screen help menus as a guide. Spare system
modules will be delivered pre-tuned from the factory and will not require
re-tuning.
N.B. 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!
Required Equipment
– PC/AT computer with PCLocals software; see different PCLocals
Instructions for instructions on installation and use.
– M2BUS adapter DAU–2 and other service accessories; see equipment
setup pictures.
– Multimeter or DVM.
– Power supply 13.2 V and minimum 5 A current capability.
– GSM radio telephone test station or separate measuring equipment as
follows:– frequency counter (±1 ppm)
– RF generator
– pulse power meter
– spectrum analyzer
– attenuator and branching unit
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 6 Issue 2 05/2000
Equipment Setup
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.
To set up equipment, connect the M2BUS adapter to the serial port
(RS-232) of the computer. In case you are using a 9-pin serial port
(normal with an AT set) use the mating adapter supplied with the M2BUS
adapter.
Attach one end of the DKH-1 modular cable to the DAU-2 PC/M2BUS
adapter and the other end to the service box. Connect one end of another
modular cable also to the service box and the other end to the phone’s
system cable.
Then connect handset’s spiral cable to the service box as well.
For audio testing connect the coaxial cables as follows:
- Connect both coaxial BNC - BNC cables to the connectors of service box
marked as MIC and EAR.
- Attach EAR line of coaxial cable to AF INPUT of test equipment.
- Attach MIC line of coaxial cable to MOD GEN OUTPUT of test
equipment.
The RF cable should be connected between the RF connector of the
phone and the RF connector of the test equipment.
Last, connect the system cable to the phone as well as power supply and
switch the power on to all equipments.
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 7
Issue 2 05/2000
NME-2A
Figure 1. Equipment setup with Audio Test Box -Tuning
Item: Service accessory: Type Product code:
2,4 Modular cable DKH-1 9780084
3 Handset, HSE-6XA 0640098
5 Coaxial cable mini UHF-BNC not supplied
6 System Cable SCM-1 0730066
7, 8 Coaxial cable, BNC - BNC not supplied
9 Audio Test Box JBA-3 0694044
10 PC/M2BUS adapter DAU-2 0750006
- RS-232 adapter (9 pin to 25 pin) 4626170
- Software protection key PKD-1 0750018
- Service Software diskette 3.5” 0774028
- Service Software diskette 5.25” 0774031
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 8 Issue 2 05/2000
NME-2A
Figure 2. Equipment setup without Audio Test Box - Tuning
Item: Service accessory: Type Product code:
1 Service cable, DKH-5 0730038
3 Handset, HSE-6XA 0640098
5 Coaxial cable, mini UHF - BNC not supplied
6 System Cable SCM-1 0730066
10 PC/M2BUS adapter DAU-2 0750006
- RS-232 adapter (9 pin to 25 pin) 4626170
- Software protection key PKD-1 0750018
- Service Software diskette 3.5” 0774028
- Service Software diskette 5.25” 0774031
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 9
Issue 2 05/2000
Starting The Program
The program is delivered on a diskette and is copy protected with a
dongle. The program can also be installed on the hard disk, which is
recommendable to obtain a maximum data access rate. In case you want
to store the program to the hard disk, proceed according to instructions
given in PCLocals installation manual.
The program is started with the command:
NME2SERV
Enter
(or PCLSTART
Enter
)
The program can be set up work with different serial ports or display
types.
Starting options for PCLocals service software
The program is started by entering the following command:
NME2SERV
For more information about how to operate the PCLocals software, refer
to booklet PCLocals Software Instructions.
P.A.M.S.
Technical Documentation
NME–2A
Tuning Instructions
Page 10 Issue 2 05/2000
Tuning Steps
1. RSSI Reference Signal Level Storage
Reference value for the received signal strength meter are program tuned.
RSSI reference signal level programming:
– Start the service software and go to ”Main” menu.
– Select ”Phone mode” and select local mode with
Enter
key.
– Select ”Testing and Adjustments” menu and press
Enter
.
– Select ”Adjustments” menu and press
Enter
.
– Connect RF generator to antenna connector at 947.06771 MHz.
– Adjust signal generator level to –57 dBm + cable attenuation.
– Select ”RSSI Calibration” and press
Enter
.
– RSSI offset value should be within 37...49 dB.
– AGC calibration values (Compensation Term) should be
below ±2.0dB.
– Press
Esc
key.
– Store the value to the EEPROM with
Y
key.
2. AFC Diagram Storage
This tuning is used to calibrate the automatic frequency control range.
AFC tuning:
– Set RF generator frequency 947.06771 MHz at level –57 dBm.
– Select adjustments menu option ”AFC Diagram” and press
Enter
– Check that ” Cont mode channel” is 60
– The measurement result should be;
•Low over –22 kHz (< –10 kHz)
•Middle ±1.5 kHz (depends on generator frequency accuracy)
•High below +22 kHz (> 10 kHz)
– Press
Esc
key and store with
Y
key.
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