Manual Transmitter (Tx) Testing With Phoenix; General Instructions For Transmitter (Tx) Activation; Gsm Transmitter Activation - Nokia 300 Service Manual

Troubleshooting flow — Page 2 of 2

Manual transmitter (TX) testing with Phoenix

General instructions for transmitter (TX) activation

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"
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 power amplifier (PA) may be damaged.

GSM transmitter activation

Steps
1. Set the phone to local mode.
2. Activate the RF controls tool in Phoenix ( Testing → GSM → RF Controls ).
3. Make settings as shown in the figure:
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Cellular RF troubleshooting
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