Nokia n-gageqda 服务手册
RH-47
Company Confidential
3 - Service Software Instructions
Nokia Customer Care
Page 50
Copyright © 2004 Nokia Corporation
Issue 1 05/04
Company Confidential
TX I/Q tuning
Tx IQ tuning allows changing the Tx I Dc Offset, Tx Q DC Offset, amplitude difference and
phase difference. It must be performed separately on each band.
phase difference. It must be performed separately on each band.
Prerequisites:
•
A spectrum analyzer is needed to perform this tuning.
•
Connect the phone according to the setup diagrams.
•
Changing from GSM850 to GSM1900 is done automatically.
•
Use the default settings for Rx/Tx channel, Tx data type and Tx PA mode.
•
Remember to take into account jig and cable attenuations!
To start tuning:
1
From the Tuning menu, choose Tx IQ Tuning.
The following window appears: