Define modulation. Why is it necessary?
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it is the process of varying 1 or more properties of a periodic waveforms, called the carrier signal, with a modulate signal.
it is used because we can make the low signals more distance such as tv signals and etc.
it is also useful to make the low frequency to high frequency signals.
it is used because we can make the low signals more distance such as tv signals and etc.
it is also useful to make the low frequency to high frequency signals.
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