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MCQ

Q.

In QAM, both ________ of a carrier frequency are varied.

A

frequency and amplitude

B

phase and frequency

C

amplitude and phase

D

none of the above

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MCQ

1.

The minimum bandwidth of Manchester and differential Manchester is ____ that of NRZ.

A

the same as

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twice

C

thrice

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2.

In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant.

A

ASK

B

PSK

C

FSK

D

QAM

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3.

How many carrier frequencies are used in BASK?

A

2

B

1

D

none of the above

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4.

In ______ schemes, the voltages are on the both sides of the time axis. For example, the voltage level for 0 can be positive and the voltage level for 1 can be negative.

A

polar

B

bipolar

C

unipolar

D

all of the above

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5.

In _____ transmission, the carrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal.

A

AM

B

PM

C

FM

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none of the above

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