LabVIEW Advanced Signal Processing Toolkit API Reference

SI Lowpass Filter VI

  • Updated2023-02-21
  • 8 minute(s) read

SI Lowpass Filter VI

Owning Palette: Data Preprocessing VIs

Requires: Advanced Signal Processing Toolkit or Control Design and Simulation Module

Applies a lowpass filter to stimulus and response signals. Wire data to the stimulus signal in and response signal in inputs to determine the polymorphic instance to use or manually select the instance.

The lowpass filter is an elliptic infinite impulse response (IIR) filter and has no phase lag.

SI Lowpass Filter (SISO Waveform)

order specifies the filter order. The default is 6. The value of order must be greater than 0. Increasing the order value generates a sharper transition band from the filter.
stimulus signal in specifies the input waveform of the stimulus signal.
response signal in specifies the input waveform of the response signal.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
cutoff frequency specifies the cutoff frequency of the lowpass filter. The cutoff frequency must be less than half the sampling rate. The default is 0.125.
stimulus signal out returns the filtered waveform of the stimulus signal.
response signal out returns the filtered waveform of the response signal.
error out contains error information. This output provides standard error out functionality.

SI Lowpass Filter (SISO Array)

order specifies the filter order. The default is 6. The value of order must be greater than 0. Increasing the order value generates a sharper transition band from the filter.
stimulus signal in specifies an array that represents the stimulus signal.
response signal in specifies an array that represents the response signal.
sampling rate (Hz) is the sampling rate of the stimulus and response signals. The default is 1.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
cutoff frequency specifies the cutoff frequency of the lowpass filter. The cutoff frequency must be less than half the sampling rate. The default is 0.125.
stimulus signal out returns the filtered array of the stimulus signal.
response signal out returns the filtered array of the response signal.
error out contains error information. This output provides standard error out functionality.

SI Lowpass Filter (MISO Waveform)

order specifies the filter order. The default is 6. The value of order must be greater than 0. Increasing the order value generates a sharper transition band from the filter.
stimulus signals in specifies the input waveform array of the stimulus signals. Each element of the waveform array is the waveform of one stimulus signal.
response signal in specifies the input waveform of the response signal.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
cutoff frequency specifies the cutoff frequency of the lowpass filter. The cutoff frequency must be less than half the sampling rate. The default is 0.125.
stimulus signals out returns the filtered waveform array of the stimulus signals.
response signal out returns the filtered waveform of the response signal.
error out contains error information. This output provides standard error out functionality.

SI Lowpass Filter (MISO Array)

order specifies the filter order. The default is 6. The value of order must be greater than 0. Increasing the order value generates a sharper transition band from the filter.
stimulus signals in specifies an array that represents the stimulus signals. Each row in the array is one stimulus signal.
response signal in specifies an array that represents the response signal.
sampling rate (Hz) is the sampling rate of the stimulus and response signals. The default is 1.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
cutoff frequency specifies the cutoff frequency of the lowpass filter. The cutoff frequency must be less than half the sampling rate. The default is 0.125.
stimulus signals out returns the filtered array of the stimulus signals.
response signal out returns the filtered array of the response signal.
error out contains error information. This output provides standard error out functionality.

SI Lowpass Filter (MIMO Waveform)

order specifies the filter order. The default is 6. The value of order must be greater than 0. Increasing the order value generates a sharper transition band from the filter.
stimulus signals in specifies the input waveform array of the stimulus signals. Each element of the waveform array is the waveform of one stimulus signal.
response signals in specifies the input waveform array of the response signals. Each element of the waveform array is the waveform of one response signal.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
cutoff frequency specifies the cutoff frequency of the lowpass filter. The cutoff frequency must be less than half the sampling rate. The default is 0.125.
stimulus signals out returns the filtered waveform array of the stimulus signals.
response signals out returns the filtered waveform array of the response signals.
error out contains error information. This output provides standard error out functionality.

SI Lowpass Filter (MIMO Array)

order specifies the filter order. The default is 6. The value of order must be greater than 0. Increasing the order value generates a sharper transition band from the filter.
stimulus signals in specifies an array that represents the stimulus signals. Each row in the array is one stimulus signal.
response signals in specifies an array that represents the response signals. Each row in the array is one response signal.
sampling rate (Hz) is the sampling rate of the stimulus and response signals. The default is 1.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
cutoff frequency specifies the cutoff frequency of the lowpass filter. The cutoff frequency must be less than half the sampling rate. The default is 0.125.
stimulus signals out returns the filtered array of the stimulus signals.
response signals out returns the filtered array of the response signals.
error out contains error information. This output provides standard error out functionality.

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