Gsm Transmitter Troubleshooting - Nokia RM-555 Service Manual

GSM transmitter troubleshooting

Steps
1. Set the phone to local mode.
2. Activate RF controls in Phoenix (Testing→GSM→Rf Controls ).
Make settings as shown in the figure:
3. Check the basic TX parameters (i.e. power, phase error, modulation and switching spectrum), using a
communication analyser (for example CMU200).
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Figure 58 Phoenix GSM RF controls window
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RM-555
RF Troubleshooting
Issue 1