Receiver Troubleshooting; Introduction To Receiver (Rx) Troubleshooting; Setup For Rx Troubleshooting - Nokia 2608 Service Manual

RM-376
RF Troubleshooting

Receiver troubleshooting

Introduction to rece
RX can be tested by making a phone call or in local mode. For the local mode testing, use the RF CallTest in Nokia
CDMA L3 PST service software.
The main RX troubleshooting measurement is RSSI reading. This test measures the signal strength of the
received signal.

Setup for RX Troubleshooting

Use the following steps to
1. Connect RF test connector to a CMU.
2. Connect mobile terminal to a PC via the Module Jig, and connect a power supply.
3. Open RF Toolkit in L3 program.
4. Set Start RF connection in " connection " box
5. Change to FTM in "phone mode setting" box.
6. Select a Band (Cellular) in "Band setting" box.
7. Write a channel in "RF channel setting" box.
Cellular Band Test channel : 384
< Set RF channel to 384 on CMU at the same time >
8. Select "0-LNA R0" in set LN
9. Key in -92.6 in AGC box and then click "dBm to AGC" button.
< Set RF level=-92.6 dBm on CMU >
10. Click "Get DVGA "button.( DVGA value is only operated in high gain mode )
11. Select "1--LNA R1" in set LNA range box
12. Key in -81.8 in AGC box, and then click "dBm to AGC" button.
< Set RF level=-81.8 dBm on CMU >
13. Click "Get LNA offset "button.
14. Repeat 11-13 steps for getting LNA offsets of LNA2 and LNA3.
<Key in -53.8 dBm and -43.8 dBm in AGC box corresponding to LNA2 and LNA3>
After testing, it's necessary to change to "Online" in "Phone mode setting" box.
Issue1
iver (RX) tr oubleshooting
co nfigure FTM mode for RF troubleshooting.
A range box
Company Confidential
Copyright © 2008 Nokia. All rights reserved.
Page 4-11