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Worksheets

Analog and Digital Communication

Total questions: 15

Worksheet time: 12mins

Name
Class
Date
1.

The process of approximating the continuous set of values with a finite set of values is called:

a)

Modulation

b)

Sampling

c)

Quantization

d)

Approximation

2.

Select the correct order of blocks in PCM Transmitter

a)

Encoder, Quantizer, Sampler, Low Pass Filter

b)

Low Pass Filter, Quantizer, Sampler, Encoder

c)

Low Pass Filter, Sampler, Quantizer, Encoder

d)

Low Pass Filer, Encoder, Sampler, Quantizer

3.

The block that is NOT present in a PCM Transmitter

a)

Low Pass Filter

b)

Sampler

c)

Encoder

d)

Amplifier

4.

The difference between the actual analog value and approximated discrete value due to the rounding is called

a)

Quantization Error

b)

Sampling Error

c)

Reading Error

d)

Actual Error

5.

Each quantized sample is assigned the binary code that represents the discrete amplitude value closest to the pulse's actual value. This is known as

a)

Encoding

b)

Sampling

c)

Quantizing

d)

Decoding

6.

A _________ quantizer uses equal length quantization intervals linearly related to analog sample values.

a)

Uniform

b)

Non-Uniform

7.

A minimum sampling rate is ___ times the highest frequency component or upper bandwidth limit of the analog signal as per the sampling theorem.

a)

2

b)

4

c)

6

d)

8

8.

Identify the type of modulation

a)

PAM

b)

PPM

c)

PWM

d)

PCM

9.

Sampling is a process in which _________ of continuous time signal is measured at discrete instants

a)

Frequency

b)

Amplitude

c)

Phase

d)

Wavelength

10.

Identify the type of Sampling

a)

Flat top sampling

b)

Instantaneous sampling

c)

Natural sampling

11.

In ____, the frequency of the analog carrier signal is varied proportional to the digital information signal.

a)

ASK

b)

FSK

c)

PSK

d)

MSK

12.

Identify the modulation technique followed to obtain the above shown modulated signal

a)

ASK

b)

FSK

c)

PSK

d)

MSK

13.

Which of the following CANNOT be defined as a Digital to Analog conversion technique

a)

AM

b)

ASK

c)

PSK

d)

QAM

14.

In ASK, the ____ of the carrier is varied to represent two or more different signal elements

a)

Amplitude

b)

Phase

c)

Frequency

d)

All of the above

15.

___ is the process of converting analog data to digital signals

a)

Modulation

b)

Digitization

c)

Demodulation

d)

Encoding