Transmitter Troubleshooting; Introduction To Transmitter (Tx) Troubleshooting; Gsm Transmitter Troubleshooting - Nokia RM-509 Service Manual

Transmitter troubleshooting

Introduction to 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 Control"; in WCDMA transmitter testing
the best tool is "TX Control".
• Remember that re-tuning is not a fix! Phones are tuned correctly in production.
• The TX path for GSM and WCDMA are using the same filters in some bands. Please refer to
reference (page 4–25)
Note: Never activate the GSM or WCDMA transmitter without a proper antenna load. Always connect
a 50Ω load to the RF connector (antenna, RF-measurement equipment or at least a 2W dummy load);
otherwise the GSM or WCDMA Power amplifier (PA) may be damaged.

GSM transmitter troubleshooting

Steps
1. Set the phone to local mode.
2. In Phoenix, select Testing→GSM→Rf Controls . The RF Controls window opens.
3. Make the following settings:
Page 4 –14
for details.
Figure 22 Phoenix RF Controls window
COMPANY CONFIDENTIAL
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RM-509; RM-510; RM-511
RF Troubleshooting
RF component
Issue 2