Nokia N900 - Device Lock Settings

Table of Contents
General RF troubleshooting ..................................................................................................................................4–5
Introduction to RF troubleshooting ................................................................................................................4–5
Cellular RF test points .......................................................................................................................................4–5
Auto tuning.............................................................................................................................................................4–6
Introduction to RF tunings...............................................................................................................................4–6
Auto tuning........................................................................................................................................................4–6
Self test troubleshooting.......................................................................................................................................4–7
Self test troubleshooting..................................................................................................................................4–7
Receiver troubleshooting ......................................................................................................................................4–9
Introduction to receiver (RX) troubleshooting...............................................................................................4–9
GSM RX chain activation for manual measurements/GSM RSSI measurement ...........................................4–9
GSM receiver troubleshooting flowchart ..................................................................................................... 4–10
WCDMA RX chain activation for manual measurement.............................................................................. 4–10
WCDMA RSSI measurement ........................................................................................................................... 4–11
WCDMA receiver troubleshooting flowchart................................................................................................ 4–13
Transmitter troubleshooting ............................................................................................................................. 4–13
General instructions for transmitter (TX) troubleshooting........................................................................ 4–13
GSM transmitter troubleshooting................................................................................................................. 4–14
WCDMA transmitter troubleshooting ........................................................................................................... 4–16
Antenna................................................................................................................................................................ 4–17
Antenna troubleshooting.............................................................................................................................. 4–17
List of Figures
Figure 24 Cellular RF test points 1 ........................................................................................................................4–5
Figure 25 Cellular RF test points 2 ........................................................................................................................4–6
Figure 26 Phoenix GSM RSSI reading window.....................................................................................................4–9
Figure 27 Phoenix WCDMA RX Control window................................................................................................ 4–11
Figure 28 WCDMA RX generator settings .......................................................................................................... 4–12
Figure 29 Phoenix WCDMA RX power measurement window ........................................................................ 4–12
Figure 30 Phoenix GSM RF controls window..................................................................................................... 4–14
Figure 31 Antenna contacts ............................................................................................................................... 4–18
RX-51
Cellular RF troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
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