Rf Autotuning With Cmu200 - Nokia RM-42 Service Manual

RM-42
RF Troubleshooting and Manual Tuning Guide
Changed component
Tx RF ASIC Vinku (N7501)
RX RF ASIC Hinku (N7500)
Any component in the GSM TX RF chain before the PA
Any component in the GSM TX RF chain after the PA
or PA
Any component in the WCDMA TX RF chain before the
PA
Any component in the WCDMA TX RX chain after the
PA, PA, power detector or PA switch mode power
supply
Any component in the GSM RX chain
Any component in the WCDMA RX chain
Cable and adapter losses
RF cables and adapters have some losses. They have to be taken in account when the phone is tuned. As all the
RF losses are frequency dependent, the user have to be very careful and understand the measurement setup.
Notice that there are three antenna connectors in the module jig, one for GSM, one for WCDMA and one for
Bluetooth. In the following table there are RF attenuations of the module jig, MJ-48:
Band
GSM900
GSM1800
GSM1900
WCDMA TX
WCDMA RX

RF autotuning with CMU200

Before you begin
Recommended test set-up:
• Windows 2000 PC
• CMU200 communication tester
• USB to GPIB converter from National Instruments. Order information: 778416-01 GPIB-USB-B, NI-488.2 for
Windows 2000/XP/Me/98.
Before you can use the auto-tune feature, the GPIB driver from the GPIB card vendor must be installed and
running.
Then the auto tune .ini file must be in a correct place: C:\Program Files\Nokia\Phoenix\products\xx-x*
\autotune_xx-x*.ini (*= indicates the type designator of the phone, e.g. RM-42)
9241872 (Issue 1) Company Confidential
Copyright ©2005 Nokia. All Rights Reserved.
Perform following tunings
RF Channel Filter Calibration, Tx IQ Tuning, Tx Power
Level Tuning, Temperature Sensor Calibration, TX AGC
& Power Detector, Tx Band Response Calibration, Tx
LO Leakage
RF Channel Filter Calibration, Rx Calibration, Rx Band
Filter Response Compensation, Rx AM Suppression, Rx
AGC Alignment, Rx Band Response Calibration
Tx IQ Tuning, Tx Power Level Tuning
Tx Power Level Tuning
Tx AGC & Power Detector, Tx Band Response
Calibration, Tx LO Leakage
Tx AGC & Power Detector, Tx Band Response
Calibration, PA Detection
Rx Calibration, RX Band Filter Response
Compensation, RX AM Suppression
Rx AGC Alignment, RX Band Response Calibration
Attenuation
0.1 dB
0.2 dB
0.2 dB
0.3 dB
0.4 dB
Nokia Customer Care
Page 7–19