Notch filter

The notch filter is a built-in feature of the Analog-to-Digital Converter (ADC) that attenuates noise at a specified frequency. The notch filter reduces the amplitude of the signal with minimal signal distortion.

Choose a notch filter based on what noise frequencies are present in the module operating environment and any sampling requirements that are needed for control. For example, if the notch filter setting is 60 Hz, 60 Hz AC line noise and its overtones are attenuated.

For more details, see the PointMax Analog I/O Modules User Manual, publication 5034-UM003.