Wcdma Receiver Tunings; Rx Calibration (Wcdma) - Nokia RM-235 Service Manual

RM-235
RF troubleshooting
8. If all bold power levels are adjusted, click Next to continue with GSM850 EDGE.
9. Adjust power for all bold power levels to correspond the Target dBm column by pressing + or – keys.
Next actions
Continue tuning the bold power levels of the GSM900, GSM1800 and GSM1900 bands. You will see this
message, if finished successfully:

WCDMA receiver tunings

RX calibration (WCDMA)

Context
Rx calibration tuning routine calculates the real gain values of the WCDMA Rx AGC system. There is also a SAW
filter between front end LNA and mixer in the receive chain, which causes ripple in the RSSI measurement,
this is calibrated out. The SAW filter is intergated into RF ASIC N7500.
Rx calibration can be done in two different ways, manual tune and sweep mode tune. If the signal generator
in use supports frequency sweep table, the calibration is done in one step.
Steps
1. For manual tuning, set mode to Local in the Operating Mode dropdown menu.
2. In the Tuning menu, choose WCDMA→Rx Calibration .
3. Click Start.
4. Select Band "WCDMA2100 or WCDMA900".
5. Click Tune.
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