User Guide

Nokia Customer Care 6(b) - RF Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 11
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> respec-
tively <RXQ> is recommended only if the RSSI reading does not provide enough informa-
tion. 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: