User Guide

Table of Contents
General RF troubleshooting ..................................................................................................................................4–5
Introduction to RF troubleshooting ................................................................................................................4–5
RF key components ...........................................................................................................................................4–5
RF self test troubleshooting.............................................................................................................................4–7
Receiver troubleshooting ......................................................................................................................................4–8
Introduction to receiver (RX) troubleshooting...............................................................................................4–8
GSM RX chain activation for manual measurements/GSM RSSI measurement ...........................................4–8
WCDMA RX chain activation for manual measurement.................................................................................4–9
WCDMA RSSI measurement ........................................................................................................................... 4–10
Transmitter troubleshooting ............................................................................................................................. 4–10
General instructions for transmitter (TX) troubleshooting........................................................................ 4–10
GSM transmitter troubleshooting................................................................................................................. 4–11
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..................................................................................................................................... 4–23
Tx IQ tuning (GSM).......................................................................................................................................... 4–23
Tx power level tuning (GSM) ......................................................................................................................... 4–25
WCDMA receiver tunings..................................................................................................................................... 4–28
RX calibration (WCDMA) ................................................................................................................................. 4–28
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 12 Rf channel filter calibration tuning limits......................................................................................... 4–17
Table 13 RF tuning limits in Rx calibration....................................................................................................... 4–19
List of Figures
Figure 14 RF component layout bottom..............................................................................................................4–5
Figure 15 RF component layout top.....................................................................................................................4–6
Figure 16 WCDMA RX generator settings .......................................................................................................... 4–10
Figure 17 Typical readings ................................................................................................................................. 4–12
Figure 18 Antenna element................................................................................................................................ 4–13
Figure 19 Phoenix WCDMA TX control window ................................................................................................ 4–14
Figure 20 WCDMA power window ..................................................................................................................... 4–15
Figure 21 Auto tuning concept with CMU200................................................................................................... 4–16
Figure 22 Rf channel filter calibration typical values ...................................................................................... 4–17
Figure 23 Pop-up window for WCDMA2100...................................................................................................... 4–28
RM-437; RM-449; RM-450
RF troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
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