Measuring Analogue Rx I/Q Signals Using Oscilloscope - Nokia RH-37 Series Rf Troubleshooting Instructions

Nokia Customer Care
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
Wait until phone information is shown in the lower right corner of the screen.
Set operating mode to <local mode>.
Select
Wait until the RF Controls window pops up.
Select
The following picture should be displayed on an oscilloscope's screen if the receiver is
working properly:
Issue 1 07/04
RX/TX Channel
Scan Product
Testing
Band
Active unit
Operation mode
RX/TX Channel
AGC
Nokia Corporation
6(b) - RF Troubleshooting Instructions
37 or 700 or 661
RF Controls
GSM 900 or GSM1800 or GSM1900
RX
continuous
37 or 700 or 661
10
RH-37
Ctrl-R
T
F
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