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Daqarta
Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
Software for Windows
Science with your Sound Card!

The following is from the Daqarta Help system.
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Frequency Modulation (FM) Dialog

For convenience, the FM dialog includes duplicates of the main carrier phase and frequency controls that are also in the Tone Freq dialog, plus controls to select the modulator source and modulation deviation (depth), as well as to set the frequency and phase of the dedicated sine source if that is selected.

Unlike AM and Burst, FM is not an available option for noise-type waves, or for Arb or Play waves where the Step Timing option has been selected. However, note that it is possible to modulate the frequency of a noise band by a special use of amplitude modulation.

See also Frequency Modulation, Waveform Stream Controls

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Vehicle pass-by noise

Product test

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