From 12:00 PM - 4:00 PM CST on Thursday, October 18, ni.com will be undergoing system upgrades that may result in temporary service interruption.

We appreciate your patience as we improve our online experience.

Table Of Contents

Filter (Bandpass » Elliptic) (G Dataflow)

Last Modified: January 12, 2018

Filters a signal using an elliptic bandpass filter. Bandpass filters pass a certain band of frequencies.

connector_pane_image
datatype_icon

reset

A Boolean that specifies the initialization of the internal state of the node.

True Initializes the internal state to zero.
False Initializes the internal state to the final state from the previous call of this node.

This node automatically initializes the internal state to zero on the first call and runs continuously until this input is True.

Default: False

datatype_icon

signal

Input signal.

This input accepts the following data types:

  • Waveform
  • Double-precision, floating-point number
  • Complex double-precision, floating-point number
  • 1D array of waveforms
  • 1D array of double-precision, floating-point numbers
  • 1D array of complex double-precision, floating-point numbers
  • 2D array of double-precision, floating-point numbers
datatype_icon

low cutoff frequency

Low cutoff frequency of the filter. low cutoff frequency must be less than high cutoff frequency.

Default: 0.125

datatype_icon

high cutoff frequency

High cutoff frequency of the filter. high cutoff frequency must be greater than low cutoff frequency and less than 0.5*fs, where fs is the sampling frequency.

Default: 0.45

datatype_icon

order

Order of the filter.

Default: 2

datatype_icon

error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

datatype_icon

sampling frequency

Sampling frequency in Hz. sampling frequency must be greater than zero.

This input is available only if you wire one of the following data types to signal:

  • Double-precision, floating-point number
  • Complex double-precision, floating-point number
  • 1D array of double-precision, floating-point numbers
  • 1D array of complex double-precision, floating-point numbers
  • 2D array of double-precision, floating-point numbers

Default: 1, which is the normalized sampling frequency

datatype_icon

passband ripple

The ripple in the passband, in decibels.

passband ripple must be greater than 0.

Default: 1

datatype_icon

stopband attenuation

The attenuation in the stopband, in decibels.

stopband attenuation must be greater than 0.

Default: 60.0

datatype_icon

filtered signal

Result of filtering the input signal.

This output can return the following data types:

  • Waveform
  • Double-precision, floating-point number
  • Complex double-precision, floating-point number
  • 1D array of waveforms
  • 1D array of double-precision, floating-point numbers
  • 1D array of complex double-precision, floating-point numbers
  • 2D array of double-precision, floating-point numbers
datatype_icon

error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application


Recently Viewed Topics