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Bode Diagram Plot Using LabVIEW

by:
‎01-13-2011 12:54 PM
Last Edited by: Member Example_Scrubber_Nian ‎08-14-2017 01:29 PM

Products and Environment

This section reflects the products and operating system used to create the example.

To download NI software, including the products shown below, visit ni.com/downloads.

    Software

  • LabVIEW

Code and Documents

Attachment

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Overview

This example shows a quick way to create a filtered sine wave and plot its bode diagram plot.


Description
A Bode plot shows the magnitude vs frequency response of a circuit.  This example VI generates a sine wave sweep, sends it though a (software) filter, and plots the frequency response of the filter.  After the sine wave sweep completes the -3dB cutoff frequencies are calculated.  This VI could easily be modified for use with DAQ hardware and a physical circuit.

 

Requirements

  • LabVIEW 2012 (or compatible)

 

Steps to Implement or Execute Code

  • Select the max frequency and filter band width.
  • Run the program

 

Additional Information or References
VI Snippet

3-307.png

**This document has been updated to meet the current required format for the NI Code Exchange.**

Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.