Gsm Transmitter Activation - Nokia 500 Service Manual

RM-750
Cellular RF troubleshooting

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:
4. GSM transmitter is activated when Active Unit is set to "Tx". Nitro (N7509) supply voltages are on for
measurement purposes after this step is completed.
Optional step (not needed if GSM TX activation only required): Check the basic TX parameters (i.e. power,
5.
phase error, modulation and switching spectrum) manually, using a communication analyzer (for example
CMU–200). Change power level (in "RF Controls" tool) and make sure the power reading follows
accordingly.
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