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[ LabVIEW application ] TripleDisplay

Module by: Ed Doering

Summary: "TripleDisplay" is a LabVIEW front-panel indicator that integrates three standard signal processing displays: time-domain signal, spectrum analyzer, and spectrogram. Each display mode can be quickly selected using tabs, permitting easy comparison of spectral and time-domain representations of the same signal.

LabVIEWbanner.png This module refers to LabVIEW, a software development environment that features a graphical programming language. Please see the LabVIEW QuickStart Guide module for tutorials and documentation that will help you:
• Apply LabVIEW to Audio Signal Processing
• Get started with LabVIEW
• Obtain a fully-functional evaluation edition of LabVIEW

TripleDisplay is an invaluable tool for visualizing signals in LabVIEW. TripleDisplay is a front-panel indicator that you can use just like the built-in waveform indicator. However, TripleDisplay integrates three different display modes into the indicator (see Figure 1):

  • time-domain waveform
  • spectrum analyzer
  • spectrogram plot
Figure 1: Three display modes of TripleDisplay
Figure 1 (lvt_APP-TripleDisplay-picture.png)

Simply select the tab corresponding to the display mode you wish. You can easily identify relationships between the time-domain and frequency-domain representations of the signal with TripleDisplay.

TripleDisplay is part of a library of LabVIEW applications to accompany the textbook DSP First by McClellan, Schafer, and Yoder. Installation instructions are available at http://www.rose-hulman.edu/dspfirst. Once there, click "Getting Started" and scroll down to the LabVIEW section.

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