Nokia NHM-1 Series - Transmitter Tuning Operations; TX I;Q Tuning

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CCS Technical Documentation

NHM-1

Transmitter Tuning operations

TX I/Q Tuning

• Spectrum analyzer needed

• Tx IQ Tuning allows changing the Tx I DC Offset, Tx Q DC Offset,

Amplitude difference and Phase difference

• TX I/Q tuning starts (GSM900), then continues RX Calibration at

GSM1800 band

• Remember to take jig and cable attenuations into account!

Select Tuning =>GSM =>TX IQ Tuning

Select “Start”

The tuning is done by setting each of the sliders to desired value. The sliders can be

changed only when the tuning is ongoing.

The order of tuning should be same as the order of the sliders e.g. the Tx I DC Offset is

tuned first and Phase difference is tuned last.

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