Nokia 232N Service Manual

After  Sales

Technical Documentation

TESLA Service Software User Guide

THA–4S

Page 24

Original, 12/95

This command is used to tune the phone’s TX power levels. When
selected, the transmitter will be switched on at Power Level 0 on Channel
380.

1.Connect a power meter to the phone’s external antenna
connector

2.Select Tuning / TX Power Level

3.The Channel Number can be changed using Backspace and
Return keying commands.  After Return, the cursor will return
to the last power level selected

4.To tune a Power Level, select the level you wish to tune from
the list. The target value will appear to the left of the cursor.
Use the Coarse and Fine commands until the target value is
reached.

5.Enter the new value to EEPROM using Enter New Value

6.Follow this procedure for all the Power Levels

THIS ALIGNMENT IS ONLY NEEDED FOR THA–4 SERIES PHONES.
With this command you can check that the RX IF Frequency is tuned to
give optimum RSSI.  This is an automatic process using an 8–bit DAC.

1.Select Tuning / IF Trim Alignment

2.Set RF input signal to –93dBm on the Channel Number
indicated on the PC screen

3.Select Automatic Tuning. The RSSI is measured for each of
the 8 DAC levels, with the optimum level indicated when the
process is completed.

4.Select Re–read RSSI to check this highest level

5.Enter the new value to EEPROM by pressing Enter on the
keyboard or clicking on the corresponding button using the
mouse.