Tx I/Q Tuning; Egsm900 Band With Edge Off - Nokia RM-14 Rf Troubleshooting And Manual Tuning

Nokia Customer Care
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TX I/Q tuning

Spectrum analyzer is needed.
Tx IQ tuning allows changing the Tx I DC Offset, Tx Q DC Offset, Amplitude difference and
Phase difference.
Must be performed separately on all bands!
TX I/Q tuning steps are:
• EGSM (GSM900) with EDGE off
• EGSM with EDGE on
• GSM1800 with EDGE off
• GSM1800 with EDGE on
• GSM1900 with EDGE off
• GSM1900 with EDGE on
Remember to take jig and cable attenuations into account!
Select Tuning => TX IQ Tuning

EGSM900 band with EDGE Off

Select "Start" to begin tuning at EGSM900 band with EDGE off.
Set spectrum analyzer to required settings => OK
The tuning is carried out by setting each of the sliders to desired value. The sliders can be
changed only when the tuning is ongoing.
40 COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
RF Troubleshooting and Manual Tuning
RM-14
ISSUE 1 11/04