User Guide

9. To end the tuning, click "Finish" and "Close".

GSM transmitter tunings

Tx IQ selftuning (GSM)

Context

• The Tx path branches to I and Q signals at RF I/Q modulator. Modulator and analog hardware located after

it cause unequal amplitude and phase disturbance to I and Q signal paths. Tx IQ tuning balances the I and

Q branches.

• Tx IQ tuning must be performed on all GSM bands.

Steps

1. Start Phoenix service software.

2. Choose File→Scan Product.

3. From the Operating mode drop-down menu, set mode to Local.

4. Choose Tuning→GSM→Tx IQ selftuning.

5. Click Start.

6. Check tune all checkbox and press tune button.

Wait until the automatic tuning feature has finished. Values are written to the phone memory

automatically.

RM-208

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 7 –29