November 2007
Intermediate to advanced
736 pages
46h 32m
English
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SIDE BAND FREQUENCIES
The basic form of any process, that repeats itself periodically, is a pure sine wave of constant amplitude and frequency. Processes of a complicated nature, with amplitude or frequency changing in a haphazard manner, are composed of several elementary sinusoidal oscillations. If a 20 kHz wave is amplitude modulated with a 4 kHz wave, there exist in reality three oscillations having constant amplitude: a stronger oscillation of 20 kHz, and two equally weak oscillations of (20 – 4) = 16 kHz, and (20 + 4) = 24 kHz. The three of them appear one above the other. Adding together the amplitudes of the three waves, point by point, results in the amplitude modulated wave, Fig. 30.18.
Amplitude modulation does not signify the alteration ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.