Nokia Ringo2 TUNING INSTRUCTIONS
After Sales Technical Documentation
NHN–3N
TUNING INSTRUCTIONS
Original, 42/96
NMP Part No. 0275257
Tuning Instructions
After Sales
NHN–3N
Technical Documentation
AMENDMENT RECORD SHEET
Amendment
Number
Date Inserted By Comments
Page 2
Original, 42/96
After Sales
Tuning Instructions
Technical Documentation
NHN–3N
TUNING INSTRUCTIONS
Contents
NO TAG Introduction NO TAG
NO TAG General NO TAG
Required Equipment Page 5
Equipment Setup Page 6
Equipment Setup For Tuning A Phone Without Removing Covers Page 7
Equipment Setup For Tuning A Phone With Removing Covers Page 8
Starting the Program Page 9
Manual Tuning Steps Page 9
General Page 9
Programmed Tuning Commands Page 10
1– AFC Tuning Page 10
2 – AFC Limits Tuning Page 10
3 – RSSI and AGC Tuning Page 11
4 – Deviation Tuning Page 11
5 – TX Output Power High Tuning Page 13
6 – TX Output Power Low Tuning Page 13
7 – Battery Voltage Tuning Page 13
8 – Charger Voltage Tuning Page 13
9 – Tuning Values & Defaults Page 14
Original, 42/96
Page 3
Tuning Instructions
After Sales
NHN–3N
Technical Documentation
Introduction
General
In contrast to earlier, second–generation phones, almost all tuning of the
NHN–3N phone can be carried out with the PCLocals software. This program
turns the phone into the Locals mode, enabling control of the phone over the
external M2BUS interface.
Tuning of the NHN–3N is based on the PCLocals software communicating with
the D/A and A/D converters of the phone. In a few instances, the phone also
figures out the required correction parameter. The tuning values of the phone
reside in the EEPROM.
The program recognizes the country version of the phone and shows correct
frequencies and channels that should be used when tuning the phone. Frequencies are shown in follows:
Low Middle High
TX Ch 1 / 890.0125 Ch 500 / 902.4875 Ch 1000 / 914.9875
RX Ch 1 / 935.0125 Ch 500 / 947.4875 Ch 1000 / 959.9875
Note, that when you are doing tuning steps at the first time, the program will
search a default frequency file, a default channels file and a default power levels file. If there is none, these files are created automatically.
Note: Tunings have to be done by using an accurate 4.8 V supply. The
reference values for battery and charge voltage are set by using a 4.8 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.
Page 4
Original, 42/96
After Sales
Tuning Instructions
Technical Documentation
Required Equipment
– PC/AT computer with PCLocals software; see Sect. 5 for instructions on
installation and use.
– M2BUS adapter SCN–3 and other service accessories; see equipment set-
up pictures.
– RF–Adapter AAT–2N.
– Multimeter or DVM.
– Power supply
– DUPLEX radio telephone test station or separate measuring equipment as
follows:
– frequency counter (± 0.8 ppm)
– RF generator
– modulation analyzer
– attenuator
NHN–3N
– AF generator
– power meter
– branching unit
– SINAD meter
Original, 42/96
Page 5
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