Nokia RM-217 - Page 183

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 GSM850 or 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.
Next actions
Tuning sliders should be close to the center of the scale after the tuning and within the limits specified in
the following table. If they are not within the limits, check Tx IQ quality manually.
Min Typ Max Unit
GSM850
I DC offset / Q DC
offset
-6 -4 6 %
Ampl -1 0 1 dB
Phase 85 90 95 °
GSM900
RM-217; RM-222
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –27
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