User Guide
Table of Contents
General RF troubleshooting ..................................................................................................................................4–5
Introduction to RF troubleshooting ................................................................................................................4–5
RF key components ...........................................................................................................................................4–6
Receiver troubleshooting ......................................................................................................................................4–7
Introduction to receiver (RX) troubleshooting...............................................................................................4–7
GSM RX chain activation for manual measurements/GSM RSSI measurement ...........................................4–8
WCDMA RX chain activation for manual measurement.................................................................................4–8
WCDMA RSSI measurement ........................................................................................................................... 4–10
Transmitter troubleshooting ............................................................................................................................. 4–10
General instructions for transmitter (TX) troubleshooting........................................................................ 4–10
GSM transmitter troubleshooting................................................................................................................. 4–10
Checking antenna functionality.................................................................................................................... 4–12
WCDMA transmitter troubleshooting ........................................................................................................... 4–13
RF tunings ............................................................................................................................................................ 4–15
Introduction to RF tunings............................................................................................................................ 4–15
Autotuning for BB5 ........................................................................................................................................ 4–16
System mode independent manual tunings .................................................................................................... 4–17
RF channel filter calibration.......................................................................................................................... 4–17
PA (power amplifier) detection .................................................................................................................... 4–17
GSM receiver tunings........................................................................................................................................... 4–18
Rx calibration (GSM) ....................................................................................................................................... 4–18
Rx band filter response compensation (GSM).............................................................................................. 4–20
GSM transmitter tunings..................................................................................................................................... 4–24
Tx IQ tuning (GSM).......................................................................................................................................... 4–24
Tx power level tuning (GSM) ......................................................................................................................... 4–25
WCDMA receiver tunings..................................................................................................................................... 4–27
RX calibration (WCDMA) ................................................................................................................................. 4–27
WCDMA transmitter tunings............................................................................................................................... 4–30
Tx AGC & power detector (WCDMA)............................................................................................................... 4–30
Tx band response calibration (WCDMA) ....................................................................................................... 4–36
Tx LO leakage (WCDMA) ................................................................................................................................. 4–38
List of Tables
Table 13 Rf channel filter calibration tuning limits......................................................................................... 4–17
Table 14 RF tuning limits in Rx calibration....................................................................................................... 4–19
List of Figures
Figure 20 RF components-top...............................................................................................................................4–6
Figure 21 RF components -bottom.......................................................................................................................4–7
Figure 22 WCDMA RX generator settings .............................................................................................................4–9
Figure 23 Typical readings ................................................................................................................................. 4–12
Figure 24 RM-244 anetnna element.................................................................................................................. 4–13
Figure 25 Phoenix WCDMA TX control window ................................................................................................ 4–14
Figure 26 WCDMA power window ..................................................................................................................... 4–15
Figure 27 Auto tuning concept with CMU200................................................................................................... 4–16
Figure 28 Rf channel filter calibration typical values ...................................................................................... 4–17
Figure 29 Pop-up window for WCDMA2100...................................................................................................... 4–28
Figure 30 Pop-up window for WCDMA2100...................................................................................................... 4–30
RM-244
RF troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
Copyright © 2007 Nokia. All rights reserved.