Nokia 1610 TUNING INSTRUCTIONS 2
After Sales Technical Documentation
NHE–5 TUNING
INSTRUCTIONS
Original, 46/95
NMP PArt No. 0275077
NHE–5 Tuning Instructions
AMENDMENT RECORD SHEET
After Sales
Technical Documentation
Amendment
Number
Date Inserted By Comments
Page 2
Original, 46/95
After Sales
Technical Documentation
TUNING INSTRUCTIONS
Contents
Introduction Page 4
General Page 4
Required Equipment Page 5
Equipment Setup Page 5
Equipment Setup For Tuning A Phone Without Remowing Covers Page 6
Equipment Setup For Tuning A Phone With Remowing Covers Page 7
Starting The Software Page 8
Tuning Steps Page 9
1. RSSI Reference Signal Level Storage Page 9
2. AFC Diagram Storage Page 9
3. I/Q Modulator Amplitude Balance and Phase Shift Tuning Page 10
4. Tuning of Transmitter Power Levels Page 12
5. Charge Voltage Adjustment Page 13
6. Battery Voltage Adjustment Page 13
NHE–5 Tuning Instructions
Original, 46/95
Page 3
NHE–5 Tuning Instructions
Introduction
General
In contrast to earlier second–generation analog cellular phones almost all tuning operations of the NHE–5 are carried out using the service software. The
service software turns the phone into the locals mode, in which the phone can
be outwardly controlled via the M2BUS interface.
Tuning is based on the 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 service software 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.
After Sales
Technical Documentation
N.B. During tuning, proceed as follows:
– Take care not to damage sensitive measuring instruments with excessive
RF power.
– Carry out all tuning steps in the shortest possible time to avoid excessive
heating of RF units.
– Perform all tuning steps in the order presented.
– Never try to mask a fault by tuning it out!
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Original, 46/95
After Sales
Technical Documentation
Required Equipment
– PC/AT computer with service software; see Sect. 5 for intructions on installa-
tion and use.
– M2BUS adapter DAU–4S and other service accessories; see equipment set-
up pictures.
– Multimeter or DVM.
– GSM radio telephone test station or separate measuring equipment as fol-
lows:
– RF generator
– pulse power meter
– spectrum analyzer
– attenuator and branching unit
NHE–5 Tuning Instructions
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.
Next connect the M2BUS service cable, DAU–4S, to the serial port (RS–232) of
the computer. Attach one end of the service cable to the PC serial port and the
other end to the service box, JBU–4. For servicing the phone with the covers in
place the service box should always be used.
The RF cable should be connected between the RF connector of the test set
and the appropriate connector on JBU–4. When the phone covers are removed
the RF connection on the extension cable should be used instead.
For audio measurements connect the service cable, SCS–4, as follows:
– EAR line to AF INPUT of test equipment
– MIC line to MOD GEN OUTPUT of test equipment
Original, 46/95
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