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Min
Typ
Max
Unit
Ch. 810 / 1989.86771 MHz
-3
0
2
dB
Ch. 835 / 1994.86771 MHz
-6
-1
2
dB
12. If the values are within the limits, click Next to continue to the next band.
Next actions
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.
RM-414; RM-570
RF troubleshooting
Page 4 –36
COMPANY CONFIDENTIAL
Issue 2
Copyright © 2009 Nokia. All rights reserved.
Содержание 6600 slide
Страница 103: ...4 RF troubleshooting Nokia Customer Care Issue 2 COMPANY CONFIDENTIAL Page 4 1 Copyright 2009 Nokia All rights reserved ...
Страница 153: ...5 System Module Nokia Customer Care Issue 2 COMPANY CONFIDENTIAL Page 5 1 Copyright 2009 Nokia All rights reserved ...
Страница 185: ...Glossary Nokia Customer Care Issue 2 COMPANY CONFIDENTIAL Page Glossary 1 Copyright 2009 Nokia All rights reserved ...