User Guide

Table of Contents
General RF Troubleshooting..................................................................................................................................4–5
Introduction to RF troubleshooting ................................................................................................................4–5
RF key components ...........................................................................................................................................4–6
Non replaceable and replaceable RF components.........................................................................................4–7
General voltage checking .................................................................................................................................4–7
Phoenix self tests ..............................................................................................................................................4–9
Receiver Troubleshooting .................................................................................................................................. 4–10
Introduction to receiver (RX) troubleshooting............................................................................................ 4–10
GSM RX chain activation for manual measurements/GSM RSSI measurement ........................................ 4–11
WCDMA RX chain activation for manual measurement.............................................................................. 4–11
WCDMA RSSI measurement ........................................................................................................................... 4–13
Transmitter Troubleshooting............................................................................................................................. 4–13
General instructions for transmitter (TX) troubleshooting........................................................................ 4–13
GSM transmitter troubleshooting................................................................................................................. 4–13
GSM transmitter troubleshooting flowchart ............................................................................................... 4–16
WCDMA transmitter troubleshooting ........................................................................................................... 4–16
WCDMA transmitter troubleshooting flowchart.......................................................................................... 4–18
RF Tunings............................................................................................................................................................ 4–19
Introduction to RF tunings............................................................................................................................ 4–19
Autotuning for BB5 ........................................................................................................................................ 4–19
System Mode Independent Manual Tunings..................................................................................................... 4–20
RF channel filter calibration.......................................................................................................................... 4–20
PA (power amplifier) detection .................................................................................................................... 4–21
GSM Receiver Tunings ......................................................................................................................................... 4–21
Rx calibration (GSM) ....................................................................................................................................... 4–21
Rx band filter response compensation (GSM).............................................................................................. 4–24
GSM Transmitter Tunings.................................................................................................................................... 4–27
Tx IQ tuning (GSM).......................................................................................................................................... 4–27
Tx power level tuning (GSM) ......................................................................................................................... 4–29
WCDMA Receiver Tunings.................................................................................................................................... 4–31
RX calibration (WCDMA) ................................................................................................................................. 4–31
WCDMA Transmitter Tunings.............................................................................................................................. 4–33
Tx AGC & power detector (WCDMA)............................................................................................................... 4–33
Tx band response calibration (WCDMA) ....................................................................................................... 4–39
Tx LO leakage (WCDMA) ................................................................................................................................. 4–41
Checking antenna functionality......................................................................................................................... 4–41
List of Tables
Table 10 Rf channel filter calibration tuning limits......................................................................................... 4–20
Table 11 RF tuning limits in Rx calibration....................................................................................................... 4–23
List of Figures
Figure 23 RF key components ...............................................................................................................................4–6
Figure 24 Non-replaceable and replaceable RF components ............................................................................4–7
Figure 25 General voltage checking test points..................................................................................................4–9
Figure 26 WCDMA RX generator settings .......................................................................................................... 4–12
Figure 27 Typical readings ................................................................................................................................. 4–15
Figure 28 Phoenix WCDMA TX control window ................................................................................................ 4–17
RM-348; RM-349; RM-350
RF Troubleshooting
Issue 2 COMPANY CONFIDENTIAL Page 4 –3
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