User Guide

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

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