User Guide

RH-12/RH-28
Service Software Instructions CCS Technical Documentation
Page 70 Nokia Corporation Issue 1 02/04
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.