Nokia 6021 Service Manual
RM-94
Nokia Customer Care
6(b) - RF Troubleshooting
10
COMPANY CONFIDENTIAL
Issue 1 04/2005
Copyright © 2005 Nokia. All Rights Reserved.
Select
Scan Product
Ctrl-R
Wait until the phone information is shown in the lower right corner of the screen.
Set <operating mode> to <local mode>.
Select
Testing
T
RF Controls
F
Select
Band
GSM 900 or GSM1800 or GSM1900
Active unit
RX
Operation mode
Continuous
RX/TX Channel
37 or 700 or 661
Please refer to the fault finding chart and Appendix for proper levels at different test points.
Measuring analogue RX I/Q signals using oscilloscope
Measuring with an oscilloscope RX I and RX Q signals on the test points <RXI> respectively
<RXQ> is recommended only if the RSSI reading does not provide enough information. Input
level = -60dBm.
<RXQ> is recommended only if the RSSI reading does not provide enough information. Input
level = -60dBm.
Start Phoenix Service Software and open FBUS connection.
Select
Scan Product
Ctrl-R
Wait until phone information is shown in the lower right corner of the screen.
Set operating mode to <local mode>.
Select
Testing
T
RF Controls
F
Wait until the RF Controls window pops up.
Select
Band
GSM 900 or GSM1800 or GSM1900
Active unit
RX
Operation mode
Continuous
RX/TX Channel
37 or 700 or 661
AGC
10
The following picture should be displayed on an oscilloscope's screen if the receiver is working
properly:
properly: