Low pass filter

Low pass filter
The Low pass filter I/O filters the source's data using a first order low pass filter. Data is filtered with a first order low-pass IIR filter. The cut-off frequency and an optional gain can be set.

A typical application of the Low pass filter I/O is to remove unwanted higher frequency noise from a measurement, which may negatively affect further operations on the measured data.

Properties

To control the behavior of the Low pass filter I/O, several properties are available. These can be accessed through a popup menu which is shown when the I/O is right clicked.

Frequency

The Frequency property sets the cut-off frequency of the filter, the point where the amplitude of the signal is reduced by -3 dB. Several standard values are available, as well as a user defined setting.

Gain

A Gain property is available to apply an optional gain to the filter. Several standard values are available, as well as a user defined setting.

Common properties and actions

Related information

Multiply/Divide

The Multiply/Divide I/O multiplies or divides data of two ore more sources.

Differentiate

The Differentiate I/O differentiates the source's data.

Average

The Average I/O averages successive measurements and outputs the average of these measurements.