Digital Communications MCQs set-12 Electrical measurements MCQs: multiple choice questions and answers,Mock Tests and Practice Papers

Question:

A cycle slip occurs when the magnitude of the original phase error exceeds

1.Π radians

2.2π radians

3.π/2 radians

4.π2 radians

Posted Date:-2022-05-22 10:05:42

Question:

Acquisition is a ______ operation.

1.Linear

2.Non linear

3.Linear & Non linear

4. None of the mentioned

Posted Date:-2022-05-22 10:07:12

Question:

As the synchronization levels increases, cost

1.Decreases

2.Increases

3.Remains the same

4.None of the mentioned

Posted Date:-2022-05-22 09:55:50

Question:

Average energy per bit is given by

1.average energy symbol/log2 M

2.average energy symbol * log2 M

3.log2 M/ Average energy symbol

4.none of the mentioned

Posted Date:-2022-05-22 09:39:52

Question:

Coherent modulation requires ____ level of synchronization.

1.One

2.Two

3.Three

4.None of the mentioned

Posted Date:-2022-05-22 09:51:37

Question:

Continuous phase modulation has

1.More bandwidth efficiency

2.More smoothness

3.More bandwidth efficiency & smoothness

4.None of the mentioned

Posted Date:-2022-05-22 10:10:08

Question:

CPM has

1.Narrower bandwidth

2.Wider bandwidth

3.More bandwidth requirement

4.None of the mentioned

Posted Date:-2022-05-22 10:10:47

Question:

Entropy calculation returns

1.Random variable

2. Deterministic number

3.Random number

4.None of the mentioned

Posted Date:-2022-05-22 09:38:20

Question:

Entropy of N random variables is the _____ of the entropy of individual random variable.

1.Sum

2.Product

3.Sum of squares

4.Average

Posted Date:-2022-05-22 09:38:54

Question:

Every frequency has ____ orthogonal functions.

1.One

2.Two

3.Four

4.Six

Posted Date:-2022-05-22 09:44:51

Question:

For block codes _____ is necessary.

1.Phase synchronization

2.Frequency synchronization

3.Frame synchronization

4.None of the mentioned

Posted Date:-2022-05-22 09:53:09

Question:

FSK reception is

1.Phase Coherent

2.Phase non coherent

3.Phase Coherent & non coherent

4.None of the mentioned

Posted Date:-2022-05-22 09:40:55

Question:

FSK reception uses

1.Correlation receiver

2.PLL

3.Correlation receiver & PLL

4.None of the mentioned

Posted Date:-2022-05-22 09:41:33

Question:

Gaussian noise has _____ power spread _____ over all frequencies.

1.Zero, uniformly

2.Zero, non uniformly

3.Infinite, uniformly

4.Infinite, non uniformly

Posted Date:-2022-05-22 10:13:32

Question:

If we correlate the received signal with any one of the two orthogonal function, the obtained inner product will be

1.In phase

2.Quadrature

3.Zero

4.Cannot be determined

Posted Date:-2022-05-22 09:45:23

Question:

If we correlate the received signal with both orthogonal function the inner product will be

1.In phase

2.Quadrature

3.In phase and quadrature

4.Unity

Posted Date:-2022-05-22 09:46:05

Question:

In non coherent reception _____ is measured.

1.Phase

2.Energy

3.Power

4.None of the mentioned

Posted Date:-2022-05-22 09:42:11

Question:

In open loop method, the time reference error __________ with respect to time.

1.Increases exponentially

2.Decreases exponentially

3.Increases quadratically

4.Decreases quadratically

Posted Date:-2022-05-22 09:59:46

Question:

In phase lock which parameter is synchronized

1.Frequency

2.Phase

3.Frequency & Phase

4.None of the mentioned

Posted Date:-2022-05-22 09:51:03

Question:

In VCO the output frequency is a linear function of its input

1.Frequency

2.Voltage

3.Time period

4. None of the mentioned

Posted Date:-2022-05-22 10:04:28

Question:

In which modulation schemes, the spreading of spectrum occurs?

1.Frequency modulation

2.Amplitude modulation

3.Frequency & Amplitude modulation

4.None of the mentioned

Posted Date:-2022-05-22 10:12:33

Question:

Jamming is caused by

1.Multipath

2.Natural phenomena

3.Multipath & Natural phenomena

4.None of the mentioned

Posted Date:-2022-05-22 10:14:07

Question:

Matched filter is a _____ technique.

1.Modulation

2.Demodulation

3.Modulation & Demodulation

4.None of the mentioned

Posted Date:-2022-05-22 09:47:18

Question:

Non coherent system requires

1.Phase synchronization

2.Frequency synchronization

3.Phase & Frequency synchronization

4.None of the mentioned

Posted Date:-2022-05-22 09:52:25

Question:

Phase locked loops consists of

1.Phase detectors

2.Loop filter

3. Voltage controlled oscillator

4.All of the mentioned

Posted Date:-2022-05-22 10:03:43

Question:

PLL designs have

1.First order loop

2.Second order loop

3.Higher order loop

4.None of the mentioned

Posted Date:-2022-05-22 10:05:05

Question:

QAM uses ______ as the dimensions.

1.In phase

2.Quadrature

3.In phase & Quadrature

4.None of the mentioned

Posted Date:-2022-05-22 09:48:46

Question:

Simulation is used to determine

1.Bit error rate

2.Symbol error rate

3.Bit error

4.Symbol error

Posted Date:-2022-05-22 09:46:37

Question:

Spread spectrum signals are used for

1.Ranging

2.Determination of position

3.Ranging & Determination of position

4.None of the mentioned

Posted Date:-2022-05-22 10:16:02

Question:

Synchronization is used in system which has

1.Non coherent modulation techniques

2.Many users accessing

3.Non coherent modulation techniques & Many users accessing

4.None of the mentioned

Posted Date:-2022-05-22 09:56:32

Question:

The number of filters in CPM receiver structure is

1.LM

2.ML

3.M/L

4.None of the mentioned

Posted Date:-2022-05-22 10:11:41

Question:

The radio meter consists of

1.Low pass filter

2.High pass filter

3.Band pass filter

4.Band reject filter

Posted Date:-2022-05-22 10:15:20

Question:

The synchronization necessary for BPSK is

1.Frequency tracking

2.Bit timing

3.Phase tracking

4.All of the mentioned

Posted Date:-2022-05-22 09:53:40

Question:

The system which has ______ signal to noise ratio can tolerate larger timing error.

1.Large

2.Small

3.Large & Small

4.None of the mentioned

Posted Date:-2022-05-22 10:02:55

Question:

To avoid the loop to be driven to lock, the sweep rate should be

1.Smaller

2.Larger

3.It does not depend on it

4.None of the mentioned

Posted Date:-2022-05-22 10:08:00

Question:

Transmitter synchronization implies

1.One way communication

2.Two way communication

3.One & Two way communication

4.None of the mentioned

Posted Date:-2022-05-22 09:54:39

Question:

Uncertainty in the delay measurement is _________ to the bandwidth of signal pulse.

1.Directly proportional

2.Inversely proportional

3.Not related

4.None of the mentioned

Posted Date:-2022-05-22 10:16:45

Question:

What is the function of the edge detector?

1.Differentiation

2.Rectification

3.Differentiation & Rectification

4.None of the mentioned

Posted Date:-2022-05-22 10:09:24

Question:

When a terminal is able to utilize the measurements made on the return link it is called as

1.Open loop method

2.Closed loop method

3.Quasi close loop method

4.None of the mentioned

Posted Date:-2022-05-22 10:00:25

Question:

When phase noise and phase jitter is doubled, the phase variance increases by

1.Two times

2.Four times

3.0.5 times

4.8 times

Posted Date:-2022-05-22 10:06:27

Question:

Which FSK has no phase discontinuity?

1.Continuous FSK

2.Discrete FSK

3.Uniform FSK

4.None of the mentioned

Posted Date:-2022-05-22 09:40:22

Question:

Which is called as on-off keying?

1.Amplitude shift keying

2.Uni-polar PAM

3.Amplitude shift keying & Uni-polar PAM

4.None of the mentioned

Posted Date:-2022-05-22 09:48:11

Question:

Which method has fast acquisition and can work without return link?

1.Open loop method

2.Closed loop method

3.Open & Closed loop method

4.None of the mentioned

Posted Date:-2022-05-22 09:57:12

Question:

Which method has two way link?

1.Open loop method

2.Closed loop method

3.Open & Closed loop method

4.None of the mentioned

Posted Date:-2022-05-22 09:57:52

Question:

Which method is more accurate?

1.Closed loop synchronizer

2.Open loop synchronizer

3.Closed & Open loop synchronizer

4.None of the mentioned

Posted Date:-2022-05-22 10:08:44

Question:

Which method needs precorrect time?

1.Open loop method

2.Closed loop method

3.Open & Closed loop method

4.None of the mentioned

Posted Date:-2022-05-22 09:59:10

Question:

Which method requires external authority and is inflexible?

1.Open loop method

2.Closed loop method

3.Open & Closed loop method

4.None of the mentioned

Posted Date:-2022-05-22 09:58:29

Question:

Which reduces the effective distance between signals in signal space?

1.Time error

2.Frequency offset

3.Time error & Frequency offset

4.None of the mentioned

Posted Date:-2022-05-22 10:02:11

Question:

Which system makes the detection difficult for all users other than the intended users?

1.Low probability of intercept

2.Low probability of detection

3.Low probability of intercept & detection

4.None of the mentioned

Posted Date:-2022-05-22 10:14:49

Question:

Which system uses QAM?

1.Digital microwave relay

2.Dial up modem

3.Digital microwave relay & Dial up modem

4.None of the mentioned

Posted Date:-2022-05-22 09:49:46

Posted on by R4R Team

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Electrical measurements/Digital Communications MCQs set-12 Sample Test,Sample questions

Question: A cycle slip occurs when the magnitude of the original phase error exceeds

Question: Acquisition is a ______ operation.

Question: As the synchronization levels increases, cost

Question: Average energy per bit is given by

Question: Coherent modulation requires ____ level of synchronization.

Question: Continuous phase modulation has

Question: CPM has

Question: Entropy calculation returns

Question: Entropy of N random variables is the _____ of the entropy of individual random variable.

Question: Every frequency has ____ orthogonal functions.

Question: For block codes _____ is necessary.

Question: FSK reception is

Question: FSK reception uses

Question: Gaussian noise has _____ power spread _____ over all frequencies.

Question: If we correlate the received signal with any one of the two orthogonal function, the obtained inner product will be

Question: If we correlate the received signal with both orthogonal function the inner product will be

Question: In non coherent reception _____ is measured.

Question: In open loop method, the time reference error __________ with respect to time.

Question: In phase lock which parameter is synchronized

Question: In VCO the output frequency is a linear function of its input

Question: In which modulation schemes, the spreading of spectrum occurs?

Question: Jamming is caused by

Question: Matched filter is a _____ technique.

Question: Non coherent system requires

Question: Phase locked loops consists of

Question: PLL designs have

Question: QAM uses ______ as the dimensions.

Question: Simulation is used to determine

Question: Spread spectrum signals are used for

Question: Synchronization is used in system which has

Question: The number of filters in CPM receiver structure is

Question: The radio meter consists of

Question: The synchronization necessary for BPSK is

Question: The system which has ______ signal to noise ratio can tolerate larger timing error.

Question: To avoid the loop to be driven to lock, the sweep rate should be

Question: Transmitter synchronization implies

Question: Uncertainty in the delay measurement is _________ to the bandwidth of signal pulse.

Question: What is the function of the edge detector?

Question: When a terminal is able to utilize the measurements made on the return link it is called as

Question: When phase noise and phase jitter is doubled, the phase variance increases by

Question: Which FSK has no phase discontinuity?

Question: Which is called as on-off keying?

Question: Which method has fast acquisition and can work without return link?

Question: Which method has two way link?

Question: Which method is more accurate?

Question: Which method needs precorrect time?

Question: Which method requires external authority and is inflexible?

Question: Which reduces the effective distance between signals in signal space?

Question: Which system makes the detection difficult for all users other than the intended users?

Question: Which system uses QAM?

More MCQS

Search

R4R Team

Question:
A cycle slip occurs when the magnitude of the original phase error exceeds

Question:
Acquisition is a ______ operation.

Question:
As the synchronization levels increases, cost

Question:
Average energy per bit is given by

Question:
Coherent modulation requires ____ level of synchronization.

Question:
Continuous phase modulation has

Question:
CPM has

Question:
Entropy calculation returns

Question:
Entropy of N random variables is the _____ of the entropy of individual random variable.

Question:
Every frequency has ____ orthogonal functions.

Question:
For block codes _____ is necessary.

Question:
FSK reception is

Question:
FSK reception uses

Question:
Gaussian noise has _ power spread _ over all frequencies.

Question:
If we correlate the received signal with any one of the two orthogonal function, the obtained inner product will be

Question:
If we correlate the received signal with both orthogonal function the inner product will be

Question:
In non coherent reception _____ is measured.

Question:
In open loop method, the time reference error __________ with respect to time.

Question:
In phase lock which parameter is synchronized

Question:
In VCO the output frequency is a linear function of its input

Question:
In which modulation schemes, the spreading of spectrum occurs?

Question:
Jamming is caused by

Question:
Matched filter is a _____ technique.

Question:
Non coherent system requires

Question:
Phase locked loops consists of

Question:
PLL designs have

Question:
QAM uses ______ as the dimensions.

Question:
Simulation is used to determine

Question:
Spread spectrum signals are used for

Question:
Synchronization is used in system which has

Question:
The number of filters in CPM receiver structure is

Question:
The radio meter consists of

Question:
The synchronization necessary for BPSK is

Question:
The system which has ______ signal to noise ratio can tolerate larger timing error.

Question:
To avoid the loop to be driven to lock, the sweep rate should be

Question:
Transmitter synchronization implies

Question:
Uncertainty in the delay measurement is _________ to the bandwidth of signal pulse.

Question:
What is the function of the edge detector?

Question:
When a terminal is able to utilize the measurements made on the return link it is called as

Question:
When phase noise and phase jitter is doubled, the phase variance increases by

Question:
Which FSK has no phase discontinuity?

Question:
Which is called as on-off keying?

Question:
Which method has fast acquisition and can work without return link?

Question:
Which method has two way link?

Question:
Which method is more accurate?

Question:
Which method needs precorrect time?

Question:
Which method requires external authority and is inflexible?

Question:
Which reduces the effective distance between signals in signal space?

Question:
Which system makes the detection difficult for all users other than the intended users?

Question:
Which system uses QAM?