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MCQ

Q.

In _____ transmission, the phase of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal.

A

AM

B

PM

C

FM

D

none of the above

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MCQ

1.

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

Discussion

MCQ

2.

. Block coding can help in _______ at the receiver.

A

Synchronization

B

Error detection

C

Attenuation

D

(a) and (b)

Discussion

MCQ

3.

In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant.

A

ASK

B

PSK

C

FSK

D

QAM

Discussion

MCQ

4.

. The constellation diagram of BPSK has ______ dots

A

2

B

1

D

none of the above

Discussion

MCQ

5.

. Two common scrambling techniques are ________

A

NRZ and RZ

B

AMI and NRZ

C

B8ZS and HDB3

D

Manchester and differential Manchester

Discussion

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