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Q.

In _________, the frequency of the carrier signal is varied to represent data. Both peak amplitude and phase remain constant.

A

ASK

B

PSK

C

FSK

D

QAM

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MCQ

1.

In a _____ scheme, all the signal levels are on one side of the time axis, either above or below.

A

polar

B

bipolar

C

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all of the above

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2.

How many carrier frequencies are used in QPSK?

A

2

B

1

D

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3.

In Manchester and differential Manchester encoding, the transition at the middle of the bit is used for __________

A

bit transfer

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C

synchronization

D

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4.

The ________ mode provides synchronization for the entire stream of bits must. In other words, it guarantees that the data arrive at a fixed rate.

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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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