November 2007
Intermediate to advanced
736 pages
46h 32m
English
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THE LOWEST CARRIER FREQUENCY
The carrier wave itself must have a frequency far higher than the highest video frequency, otherwise, the shape of the modulation would not be clearly reflected in the modulated carrier. This will be clear from Fig. 30.17.
With a carrier frequency of at least five times as great as the modulation frequency, the modulation shape finds clear expression in the modulated carrier, Fig. 30.17 (a). On the other hand, when carrier frequency is only twice modulation frequency, it is scarcely possible to recognise the shape of the modulation, as shown in Fig. 30.17 (b).
The carrier frequency chosen is, in practice, at least five times as great as the modulation frequency. For television, carrier waves must be used with a frequency ...
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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.