WCDMA receiver troubleshooting flowchart
Troubleshooting flow
Transmitter Troubleshooting
General instructions for transmitter (TX) troubleshooting
Please note the following before performing transmitter tests:
•
TX troubleshooting requires TX operation.
•
Do not transmit on frequencies that are in use.
•
The transmitter can be controlled in local mode for diagnostic purposes.
•
The most useful Phoenix tool for GSM transmitter testing is “RF Controls”, in WCDMA transmitter testing
the best tool is “TX Control”.
•
Remember that re-tuning is not a fix! Phones are tuned correctly in production.
Note: Never activate the GSM or WCDMA transmitter without a proper antenna load. Always connect
a 50 Ω load to the RF connector (antenna, RF-measurement equipment or at least a 2 W dummy
load); otherwise the GSM or WCDMA Power amplifier (PA) may be damaged.
GSM transmitter troubleshooting
Steps
1. Set the phone to local mode.
RM-484; RM-485; RM-486
RF Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –13
Copyright © 2009 Nokia. All rights reserved.
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