NHL-10
CCS Technical Documentation RF Troubleshooting
10 COMPANY CONFIDENTIAL ISSUE 2 01/2004
Copyright © 2003 Nokia. All Rights Reserved.
fections. DCN2 centres the differential signal with respect to the common mode reference volt-
age of 1.35V. Differential, filtered I/Q-signals are finally fed to the sigma-delta ADC’s in the
UEM. Further filtering in the digital domain occurs in the sinc decimation filter and DSP based
FIR filters
General Instructions for RX Troubleshooting
Connect the phone to a PC with DAU-9S cable and dongle and follow the following instructions.
Measuring RX I/Q signals using RSSI
• Start Phoenix Service Software and establish a connection to the phone.
• Select File -> Scan Product Ctrl R.
• Wait until the phone software version is shown in the lower part of the screen.
• Select Testing -> RF controls.
• Select Band -> GSM900/GSM1800/GSM1900.
• Active unit -> RX.
• Operation mode -> Burst.
• RX/TX channel -> 37/700/661.
• Select RF Alt-M
Testing -> T
RSSI -> R
The set-up now looks like this:
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