RM-14
Nokia Customer Care
RF Troubleshooting and Manual Tuning
42
COMPANY CONFIDENTIAL
ISSUE 1 11/04
Copyright © 2004 Nokia. All Rights Reserved.
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
Repeat the same tuning steps as for the EGSM900 band above.
Tuning will automatically move to the next step,
EGSM1800 with EDGE on
when you press
“
Save & Continue
”.
GSM1800 band with EDGE On
Choose “Start” to begin tuning.
Set the spectrum analyzer to required settings for GSM1800 band =>
OK.
Repeat the same tuning steps as for the EGSM900 band above.
Tuning will automatically move to the next step,
EGSM1900 with EDGE off
when you press
“
Save & Continue.
GSM1900 band with EDGE Off
Choose “Start” to begin tuning.
Set the spectrum analyzer to required settings for GSM1900 band=>
OK.
Repeat the same tuning steps as for the EGSM900 band above.
Tuning will automatically move to the next step,
EGSM1900 with EDGE on
when you press
“
Save & Continue
”.
Table 15:
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