User Guide

RH-12/RH-28
Service Software Instructions CCS Technical Documentation
Page 72 Nokia Corporation Issue 1 02/04
(f0+68kHz on spectrum analyzer screen).
Tx IQ Tuning limits are the same for all bands (GSM900, GSM1800 and GSM1900):
Tuning will automatically move to the next step, EGSM900 with EDGE on when you
press “Save & Continue”.
EGSM900 band with EDGE On
Choose “Start” to begin tuning.
Set the spectrum analyzer to required settings for EGSM900 band => OK
Repeat the same tuning steps as for the EGSM900 with EDGE off above.
Tuning will automatically move to the next step, EGSM1800 with EDGE off when you
press “Save & Continue”.
EGSM1800 band with EDGE Off
Choose “Start” to begin tuning.
Set the spectrum analyzer to required settings settings for GSM1800 band => OK
Before tuning After tuning
Tuning Limits EDGE off EDGE on
TX I DC Offset -4 … +4 -6 … +6
TX Q DC Offset -4 … +4 -6 … +6
Amplitude Difference -1.2 … +1.2 -1 … +1
Phase Difference 80 … 100 80 … 100