DEWE-43A
TECHNICAL REFERENCE MANUAL
If aliasing is caused by a clipped or overranged waveform, (exceeding the voltage range of the ADC) it
can’t be rejected with any filter. The ADC assumes the closest value to the actual value of the signal in its
digital range when the signal is clipping. The result of clipping is also a sudden change in the signal
slope and results in corrupt digital data with high-frequency energy. This energy is spread over the
complete frequency spectrum and is aliased back into the baseband. Do not allow the signal to exceed
the input range to avoid this.
Image 5: Idle channel noise (input terminated with 50Ω)
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