AM and FM Modulation of ASCII Input

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Continuous sinusoidal oscillations can be used to transmit discrete data such as ASCII-encoded characters. Click the characters to build a message or "reset" to clear it. The binary ASCII code is displayed for each character, as well as an example of a modulated signal containing the entire message. Toggle between AM and FM modulation: AM uses high amplitudes (1.5) for ones and low amplitudes (0.5) for zeros; FM uses high frequencies for ones and low frequencies for zeros. You can also change the carrier frequency.

Contributed by: Timothy M. Walker (September 2013)
Open content licensed under CC BY-NC-SA


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