Transmission Questions

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1.

Unipolar, bipolar, and polar encoding are types of _______ encoding.

A

line

B

block

C

NRZ

D

Manchester

Correct Answer: A

None.

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2.

_______ encoding has a transition at the middle of each bit.

A

RZ

B

Manchester

C

Differential Manchester

D

All the above

Correct Answer: D

None.

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3.

_______ encoding has a transition at the beginning of each 0 bit.

A

RZ

B

Manchester

C

Differential Manchester

D

All the above

Correct Answer: C

None.

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4.

PCM is an example of _______ conversion.

A

digital-to-digital

B

digital-to-analog

C

analog-to-analog

D

analog-to-digital

Correct Answer: D

None.

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5.

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

Correct Answer: D

None.

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6.

The Nyquist theorem specifies the minimum sampling rate to be_______.

A

equal to the lowest frequency of a signal

B

equal to the highest frequency of a signal

C

twice the bandwidth of a signal

D

twice the highest frequency of a signal

Correct Answer: D

None.

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7.

Which of the following encoding methods does not provide for synchronization?

A

NRZ-L

B

RZ

C

NRZ-I

D

Manchester

Correct Answer: A

None.

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8.

Which encoding method uses alternating positive and negative values for 1s?

A

NRZ-I

B

RZ

C

Manchester

D

AMI

Correct Answer: D

None.

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9.

Which quantization level results in a more faithful reproduction of the signal?

A

2

B

8

C

16

D

32

Correct Answer: D

None.

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10.

. Block coding can help in _______ at the receiver.

A

Synchronization

B

Error detection

C

Attenuation

D

(a) and (b)

Correct Answer: D

None.

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