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Frequency Modulation (FM) Techniques in LabVIEW

Module by: Ed Doering. E-mail the authorEdited By: Erik Luther, Sam Shearman

Summary: Frequency modulation synthesis (FM synthesis) creates a rich spectrum using only two sinusoidal oscillators. Implementing the basic FM synthesis equation in LabVIEW requires a special technique to make one oscillator vary the phase function of the other oscillator. Learn how to implement the basic FM equation, and also hear an audio demonstration of the equation in action.

Table 1
LabVIEWq.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

Overview

Frequency modulation synthesis (FM synthesis) creates a rich spectrum using only two sinusoidal oscillators; refer to FM Mathematics for a complete treatment of the mathematics of FM synthesis. Implementing the basic FM synthesis equation in LabVIEW requires a special technique to make one sinusoidal oscillator vary the phase function of the other sinusoidal oscillator. The following screencast video walks you through the implementation process of the basic FM equation and includes an audio demonstration of the equation in action.

Refer to TripleDisplay to install the front-panel indicator used to view the signal spectrum.

Figure 1: [video] Implementing the basic FM synthesis equation in LabVIEW
Figure 1 (mod_fm-technique-implement.html)

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