Modulation and Carrier Waves

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What happens when the amplitude sensitivity ka of the modulator is large enough to make |ka m(t)| >1 for any t?

The carrier wave disappears

The carrier wave becomes under-modulated

The carrier wave remains the same

The carrier wave becomes over-modulated (correct)

What is the unit of measurement for the carrier amplitude Ac and the message signal m(t)?

Watts

Amps

Volts (correct)

Hz

What is the condition for the envelope to have the same shape as the message signal m(t)?

The amplitude of ka m(t) is always equal to unity

The amplitude of ka m(t) is always greater than unity

The amplitude of ka m(t) is always less than unity (correct)

The amplitude of ka m(t) is randomly varying

What is the term for the absolute maximum value of ka m(t) multiplied by 100?

Percentage modulation Signup and view all the answers

What is the condition for the carrier frequency in relation to the message signal bandwidth?

The carrier frequency is much greater than the message bandwidth Signup and view all the answers

What happens when the carrier frequency is not much greater than the highest frequency component W of the message signal?

An envelope cannot be visualized satisfactorily Signup and view all the answers

What is the purpose of amplitude modulation?

To transmit information pertaining to the message signal m(t) Signup and view all the answers

What is the term for the amplitude of the modulated wave s(t)?

Envelope Signup and view all the answers

What is the consequence of over-modulation?

Envelope distortion Signup and view all the answers

What is the relationship between the amplitude of ka m(t) and unity in amplitude modulation?

The amplitude of ka m(t) is always less than unity Signup and view all the answers

Modulation and Carrier Waves

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Questions and Answers

What happens when the amplitude sensitivity ka of the modulator is large enough to make |ka m(t)| >1 for any t?

What is the unit of measurement for the carrier amplitude Ac and the message signal m(t)?

What is the condition for the envelope to have the same shape as the message signal m(t)?

What is the term for the absolute maximum value of ka m(t) multiplied by 100?

What is the condition for the carrier frequency in relation to the message signal bandwidth?

What happens when the carrier frequency is not much greater than the highest frequency component W of the message signal?

What is the purpose of amplitude modulation?

What is the term for the amplitude of the modulated wave s(t)?

What is the consequence of over-modulation?

What is the relationship between the amplitude of ka m(t) and unity in amplitude modulation?

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