why pre Emphasis and De Emphasis are used in frequency modulation but not in amplitude modulation?
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⇔The shaping of audio on Frequency Modulation limits the frequency shifting to keep the transmitted frequency within its allowed range. The signal width audio determines the frequency swing.
⇔On Amplitude modulation, the audio is imposed on the carrier. It too has upper and lower audio range.
⇔This is why Emphasis and De-Emphasis are used in frequency Modulation but no in Amplitude Modulation.
:)
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