LG T5100 Service Manual page 117

7. Service and Calibration
f) Click the PM Start button.
g) Repeat above procedure until the displayed number in Power Measurement window is 12.
h) Click the Calculate button, then the service software calculate the channel compensation
parameters.
i) Saving updated calibration data into phone by clicking Calib Saving button.
NOTE
If the calibration does not done for all channels, 5 channels for EGSM900 and 7 channels for
DCS1800, the service software reports, "Please execute after measuring the PM".
B. TX Calibration
In order for the Tx power to be within the GSM specifications for each Tx level, some calibration is
necessary. In total, four calibrations are required per transmit band, power calibration, channel
compensation, temperature compensation and low voltage compensation. Of these, temperature
compensation and low voltage compensation are not needed in replacement of the circuit and channel
compensation is not needed because the transmit power is in GSM specification with enough margin
In power compensation, the channel numbers used in Tx band are;
E-GSM band : 62.
DCS band : 699.
And the target powers in dBm for each power level are;
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