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In TV transmission, sound signal is ________ modulated.

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In TV transmission, sound signal is ________ modulated.

(a) Phase

(b) Pulse

(c) Frequency

(d) Amplitude

I got this question during an online exam.

The doubt is from Transmitter topic in division Elements of Communication System of Analog Communications

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Correct choice is (c) Frequency

The best I can explain: Amplitude Modulation is invariably used for picture transmission while frequency modulation is generally used for transmission of sound due to its inherent advantages over amplitude modulation. It is not suitable for transmitting videos due to its large bandwidth.

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