User Guide

CCS Technical Documentation 3 - Service Software
Company Confidential NMM-3
Issue 1 (11/2003) Copyright  2003 Nokia Corporation Page 3-29
Company Confidential
• Select “Save & Continue” to start the tuning
• Continue Tuning for GSM1800 Select “Save & Continue” to start the tuning
• Typical values for GSM1800 are shown below
Transmitter Tunings
TX I/Q Tuning
• Spectrum analyser needed. Use 10dB external pad
• Tx IQ Tuning allows changing the Tx I DC Offset, Tx Q DC Offset, Amplitude dif-
ference and Phase difference
• Must be done separately on both bands!
• Start TX I/Q Tuning at EGSM (GSM900), then continue at GSM1800 band.
• Remember to take jig and cable attenuations into account!
• Select >Tuning >GSM>Tx IQTuning