User Guide

Table of Contents
RF key components ................................................................................................................................................4–5
RF Self Tests.............................................................................................................................................................4–5
Running RF self tests with Phoenix.................................................................................................................4–5
RF self test error codes .....................................................................................................................................4–6
Troubleshooting with RF Self Tests.................................................................................................................4–8
RF self test troubleshooting overview .......................................................................................................4–8
RF-BB interface troubleshooting (ST_CDSP_RF_BB_IF_TEST)......................................................................4–8
Power supply troubleshooting (ST_CDSP_RF_SUPPLY_TEST) .................................................................. 4–10
PLL self test troubleshooting (ST_CDSP_PLL_PHASE_LOCK_TEST)............................................................ 4–10
RX IQ interface troubleshooting (ST_CDSP_RX_IQ_LOOP_BACK_TEST)..................................................... 4–11
TX selftest troubleshooting (ST_CDSP_PWR_DETECTOR_BIAS_TEST and
ST_CDSP_GSM_TX_POWER_TEST) ...................................................................................................... 4–12
Receiver Troubleshooting .................................................................................................................................. 4–14
Introduction to RX troubleshooting............................................................................................................. 4–14
GSM RX chain activation for manual measurements/GSM RSSI measurement ........................................ 4–14
Transmitter Troubleshooting............................................................................................................................. 4–14
General instructions for TX troubleshooting............................................................................................... 4–14
GSM transmitter troubleshooting................................................................................................................. 4–15
Checking antenna functionality.................................................................................................................... 4–16
RF auto-tuning..................................................................................................................................................... 4–18
List of Figures
Figure 22 RF key components - bottom...............................................................................................................4–5
Figure 23 Typical readings ................................................................................................................................. 4–16
Figure 24 Antenna module assembly................................................................................................................ 4–17
Figure 25 Antenna module assembly attached to the B-cover....................................................................... 4–17
Figure 26 Antenna components and contacts.................................................................................................. 4–18
Figure 27 Auto-tuning concept with CMU200................................................................................................... 4–19
RM-443
RF Troubleshooting
Issue 2 COMPANY CONFIDENTIAL Page 4 –3
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