Filtering of analog voltage signals is a powerful method for removing unwanted signal features (like noise) from a single waveform acquisition and emphasizing signal features of interest. Traditional analog filters are usually limited to rather simple filtering methods, such as low-pass filtering, high-pass filtering and band-pass filtering.
Numerical filtering of digitized waveform data, such as that now available on-board GaGe’s new-generation digitizers, allows much more complex filtering methods to be implemented with no CPU loading.