Nokia RM-70 User Manual

Table of Contents
Introduction to RF troubleshooting.....................................................................................................................7–5
Receiver troubleshooting......................................................................................................................................7–5
Introduction to RX troubleshooting................................................................................................................7–5
General instructions for RX troubleshooting..................................................................................................7–6
Reciever (RX) troubleshooting.........................................................................................................................7–7
GSM Rx chain activation for manual measurements / GSM RSSI measurement..........................................7–9
Transmitter troubleshooting................................................................................................................................7–9
General instructions for TX troubleshooting..................................................................................................7–9
General instructions for TX troubleshooting................................................................................................7–11
Checking antenna functionality.....................................................................................................................7–14
Synthesizer troubleshooting...............................................................................................................................7–15
RF tunings.............................................................................................................................................................7–16
Introduction to RF tunings.............................................................................................................................7–16
Auto tuning for BB5.0.....................................................................................................................................7–16
System mode independent manual tunings.....................................................................................................7–17
RF channel filter calibration...........................................................................................................................7–17
PA (power amplifier) detection.....................................................................................................................7–18
GSM receiver tunings............................................................................................................................................7–18
Rx calibration (GSM)........................................................................................................................................7–18
Rx band filter response compensation (GSM)...............................................................................................7–21
GSM transmitter tunings......................................................................................................................................7–25
Tx IQ tuning (GSM)...........................................................................................................................................7–25
Tx power level tuning (GSM)..........................................................................................................................7–26
List of Tables
Table 12 Rf channel filter calibration tuning limits..........................................................................................7–17
Table 13 RF tuning limits in Rx calibration........................................................................................................7–20
List of Figures
Figure 40 RF Controls window..............................................................................................................................7–7
Figure 41 RSSI Reading window...........................................................................................................................7–9
Figure 42 RF Controls window............................................................................................................................7–11
Figure 43 RF Controls window............................................................................................................................7–14
Figure 44 Antenna module..................................................................................................................................7–14
Figure 45 Auto tuning concept with CMU200....................................................................................................7–16
Figure 46 Rf channel filter calibration typical values.......................................................................................7–17
RM-70
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –3
Copyright © 2005 Nokia. All rights reserved.

Nokia RM-70 Specifications

General

Brand	Nokia
Model	RM-70
Category	Cell Phone
Language	English