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MCQ

Q.

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

D

none of the above

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MCQ

1.

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

Discussion

MCQ

2.

ASK, PSK, FSK, and QAM are examples of ________ conversion.

A

digital-to-digital

B

digital-to-analog

C

analog-to-analog

D

analog-to-digital

Discussion

MCQ

3.

In _______ transmission, a start bit and a stop bit frame a character byte

A

asynchronous serial

B

synchronous serial

C

parallel

D

(a) and (b)

Discussion

MCQ

4.

If the frequency spectrum of a signal has a bandwidth of 500 Hz with the highest frequency at 600 Hz, what should be the sampling rate, according to the Nyquist theorem?

A

200 samples/s

B

500 samples/s

C

1000 samples/s

D

1200 samples/s

Discussion

MCQ

5.

The idea of RZ and the idea of NRZ-I are combined into the ________ scheme

A

Manchester

B

differential Manchester

C

both (a) and (b)

D

neither (a) nor (b)

Discussion

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