5. When the values have been written to the phone memory, click Next to change to the next band.
6. When all bands have been tuned, click Finish and Close to end the tuning procedure.
Next action
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/GSM900
I DC offset / Q DC
offset
-6 -4 4 6 dB
Ampl -1 0 1 dB
Phase 85 90 95 dB
GSM1800/GSM1900
I/Q DC -6 0.5 6 dB
Ampl -1 0 1 dB
Phase 95 100 110 dB
Tx power level tuning (GSM)
Context
Because of variations at IC process and discrete component values, the actual transmitter RF gain of each
phone is different. Tx power level tuning is used to find out mapping factors called 'power coefficients’. These
adjust the GSM transmitter output power to fulfill the specifications.
RM-91; RM-92
Nokia Customer Care RF Troubleshooting and Manual Tuning Guide
Page 7 –42 COMPANY CONFIDENTIAL Issue 1
Copyright © 2006 Nokia. All rights reserved.
To Next Page
Loading...
