User Guide

CCS Technical Documentation
Page 60 Copyright ãNokia. All rights reserved. Issue 1 01/03
Tuning starts at the EGSM900 band automatically when you open Close the “TX I/Q Tun-
ing” – dialog. Move the sliders to reach values within specified limits
Set spectrum analyzer center frequency to 897.4 MHz, span 200kHZ, RBW and VWB
3kHz and sweeptime to 2 seconds.
Tune LO leak to minimum with TXI/TXQ DC offset control (f0 on spectrum analyzer
screen)
Tune wrong sideband to minimum using Amplitude/Phase difference controls (f0+68kHz
Tuning limits:
I DC Offset -6…+6
Q DC Offset -6…+6
Amplitude difference -1…+1
Phase difference
- 80°…100°