AM WAVE MAY BE REPRESENTED AS E(T) COS ΩCT WHERE E(T) ISSelect one:a. ENVELOPE OF THE AM WAVEb. NONE OF THE ABOVEc. CARRIER SIGNALd. AMPLITUDE OF MODULATING SIGNAL
Question
AM WAVE MAY BE REPRESENTED AS E(T) COS ΩCT WHERE E(T) ISSelect one:a. ENVELOPE OF THE AM WAVEb. NONE OF THE ABOVEc. CARRIER SIGNALd. AMPLITUDE OF MODULATING SIGNAL
Solution
The correct answer is a. ENVELOPE OF THE AM WAVE.
In an Amplitude Modulated (AM) wave, the term E(t) represents the envelope of the wave. This envelope corresponds to the shape of the modulating signal or information signal. The cosine term, cos Ωct, represents the carrier signal. The carrier signal is the high frequency signal that carries the information signal. The amplitude of the carrier signal varies in accordance with the information signal, hence the term Amplitude Modulation.
Similar Questions
Frequency components of an AM wave (m = modulation index) areSelect one:a. Upper side band (ωc + ωm) having amplitude mA/2b. All of the abovec. Lower side band (ωc - ωm) having amplitude mA/2d. Carrier frequency (ωc ) with amplitude A
Ex : For the AM waveform shown below, determine a) Peak amplitude of the upper and lower side frequencies b) Peak amplitude of the unmodulated carrier c) Peak change in the amplitude of the envelope d) Coefficient of modulation Percent modulation
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In a travelling wave, the amplitude is . However, in a standing wave, the amplitude is .
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