Digital Modulation Techniques Quiz | Digital Modulation Techniques Multiple Choice Questions with Answers

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
61 Matched filter may be optimally used only for
A Gaussian noise
B Transit time noise
C Flicker
D All of the above

Answer: Gaussian noise
62 T1 carrier system is used
A For PCM voice transmission
B For delta modulation
C For frequency modulated signals
D None of the above

Answer: For PCM voice transmission
Advertisement
Article and Schedule Quiz Start Test!
DOWNLOAD CURRENT AFFAIRS PDF FROM APP
63 The maximum data transmission rate in T1 carrier system is
A 1.544 megabits per second
B 1000 megabits per second
C 5.6 megabits per second
D 2.6 megabits per second

Answer: 1.544 megabits per second
64 In Adaptive Delta Modulation, the slope error reduces and
A Quantization error increases
B Quantization error remains same
C Quantization error decreases
D None of the above

Answer: Quantization error increases
65 The digital modulation scheme in which the step size is not fixed is
A Delta modulation
B Adaptive delta modulation
C DPCM
D PCM

Answer: Adaptive delta modulation
66 The digital modulation technique in which the step size is varied according to the variation in the slope of the input is called
A Delta modulation
B PCM
C Adaptive delta modulation
D PAM

Answer: Adaptive delta modulation
67 The crest factor of a waveform is given as –
A 2Peak value/ rms value
B rms value / Peak value
C Peak value/ rms value
D Peak value/ 2rms value

Answer: Peak value/ rms value
68 Granular noise occurs when
A Step size is too small
B Step size is too large
C There is interference from the adjacent channel
D Bandwidth is too large

Answer: Step size is too large
69 The factors that cause quantizing error in delta modulation are
A Slope overload distortion
B Granular noise
C White noise
D Both a and b are correct

Answer: Both a and b are correct
70 The noise that affects PCM
A Transmission noise
B Quantizing noise
C Transit noise
D Both a and b are correct

Answer: Both a and b are correct
71 DPCM suffers from
A Slope over load distortion
B Quantization noise
C Both a & b
D None of the above

Answer: Both a & b
72 DPCM is a technique
A Where digital codes are the quantized values of the predicted value
B Where difference between successive samples of the analog signals are encoded into n-bit data streams
C To convert analog signal into digital signal
D All of the above

Answer: All of the above
73 In Differential Pulse Code Modulation techniques, the decoding is performed by
A Accumulator
B Quantizer
C Sampler
D PLL

Answer: Accumulator
74 In Delta Modulation, the bit rate is
A N times the sampling frequency
B N times the modulating frequency
C N times the nyquist criteria
D None of the above

Answer: N times the sampling frequency
75 In digital transmission, the modulation technique that requires minimum bandwidth is
A Delta modulation
B PCM
C DPCM
D PAM

Answer: Delta modulation
76 In Delta modulation,
A One bit per sample is transmitted
B All the coded bits used for sampling are transmitted
C The step size is fixed
D Both a and c are correct

Answer: Both a and c are correct
77 The error probability of a PCM is
A Calculated using noise and inter symbol interference
B Gaussian noise + error component due to inter symbol interference
C Calculated using power spectral density
D All of the above

Answer: All of the above
78 The expression for bandwidth BW of a PCM system, where v is the number of bits per sample and fm is the modulating frequency, is given by
A BW ≥ vfm
B BW ≤ vfm
C BW ≥ 2 vfm
D BW ≥ 1/2 vfm

Answer: BW ≥ vfm
79 One of the disadvantages of PCM is
A It requires large bandwidth
B Very high noise
C Cannot be decoded easily
D All of the above

Answer: It requires large bandwidth
80 In PCM, the parameter varied in accordance with the amplitude of the modulating signal is
A Phase
B Amplitude
C Frequency
D None of the above

Answer: None of the above

Random GK Questions

Q. Which is not correct with respect to marketing ?
Q. In public budgets, zero-base budgeting was first introduced in
Q. Which of the following mountain ranges in India are the oldest ?
Q. The smallest portion of gene which is responsible for mutation is called as:
Q. Setting of Plaster of Paris involves
Q. Where are mesons found ?
Assam Direct Recruitment Test Series

Computer Science Topics