Next action
Repeat the steps 8 to 12 for GSM1800 and GSM1900.
GSM transmitter tunings
Tx IQ tuning (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 for all GSM bands.
Steps
1. Start
Phoenix
service software.
2. From the Operating mode drop-down menu, set mode to Local.
3. Choose Tuning→GSM→Tx IQ Tuning .
4. Select Mode: Automatic.
5. Select Band: GSM900 and click Start.
6. Click Next to start GSM1800 band TX IQ tuning.
7. Click Next to start GSM1900 band TX IQ tuning.
8. ClickFinish and then Close.
RM-70
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –25
Copyright © 2005 Nokia. All rights reserved.
To Next Page
Loading...
