Short Answer Questions:
1. modulation. Why is modulation required?
2. Define is modulation index?
3. Describe the DSB-SC wave modulation with spectrum?
4. Describe the detection of AM wave using a)square law detector
b)envelope detector
5. Compare Square law detector with envelope detector?
6. Explain the detection of DSB-SC wave using a)synchronous detector
b)costas loop
7. Why is frequency translation required?
8. Explain the generation of DSB-SC wave using a)balanced modulator b)ring
modulator
9. What is envelope distortion?
10.List the various types of modulations?
11.What are the Advantages of SSB systems?
12.Compare different AM systems?
13.List Application of different AM systems?
14.What is Hilbert Transform?
15.Draw the spectrum of SSB modulated signal?
16.Draw the spectrum of VSB modulated signal?
17.What are the methods for SSB generation?
18.What are the methods for SSB generation?
19.List Application of SSB?
20.Write the expression for SSB and VSB Waves.
21.What is Angle modulation? What are different types of Angle modulation?
22.Define PM & FM? What is frequency deviation & phase deviation?
23.Compare AM and FM?
24.What are Advantages & Applications of FM
25.Plot FM wave taking modulating wave m(t) as a. Sine wave b. Square
wave
26.Define is deviation ratio?
27.What is wideband FM & Narrowband FM?
28.State Carson’s Rule?
29.Derive the equations for FM & PM waves?
30.Explain the Phasor diagram of FM signals
31.Explain how noise affects performance of analog modulation systems?
32.Define figure of merit?
33.Discuss threshold effect
34.Explain threshold extension
35.Explain pre-emphasis &de-emphasis
36.Define Average noise figure
37.Define Average Noise Temperature
38.List out various noise sources.
39.Define White noise and Shot noise.
40.Write SNR expressions for FM and AM.
41.Define Sensitivity and Selectivity
42.List the Classification of receivers.
43.Explain Super heterodyne working principle.
44.Define image frequency
45.Define Image frequency rejection ratio.
46.Compare Continuous wave and pulse modulation technique.
47.State Sampling Theorem.
48.Write Merits and Demerits of PAM
49.Compare PAM,PPM,PWM
50.List out the applications of pulse modulation techniques.
Group - II (Long Answer Questions)
51. What is Angle
modulation? What are
different types of Angle
modulation?
52. Remember
53. d
54. 2
55. Define PM & FM? What is
frequency deviation &
phase deviation?
56. Understand
57. d
58. 3
59. Compare AM and FM?
60. Remember
61. d
62. 4
63. What are Advantages &
Applications of FM?
64. Understand
65. d
66. 5
67. Explain the Phasor
diagram of FM signals?
68. Analyze
69. d
70. 6
71. Plot FM wave taking
modulating wave m(t) as
72. a. Sine wave b. Square
wave
73. Understand
74. d
75. 7
76. Define is deviation ratio?
77. Remember
78. d
79. 8
80. What is wideband FM &
Narrowband FM?
81. Remember
82. d
83. 9
84. State Carson’s Rule?
85. Remember
86. d
87. 10
88. Derive the equations for
FM & PM waves?
89. What is Angle
modulation? What are
different types of Angle
modulation?
90. Remember
91. d
92. 2
93. Define PM & FM? What is
frequency deviation &
phase deviation?
94. Understand
95. d
96. 3
97. Compare AM and FM?
98. Remember
99. d
100. 4
101. What are Advantages
& Applications of FM?
102. Understand
103. d
104. 5
105. Explain the Phasor
diagram of FM signals?
106. Analyze
107. d
108. 6
109. Plot FM wave taking
modulating wave m(t) as
110. a. Sine wave b.
Square wave
111. Understand
112. d
113. 7
114. Define is deviation
ratio?
115. Remember
116. d
117. 8
118. What is wideband FM
& Narrowband FM?
119. Remember
120. d
121. 9
122. State Carson’s Rule?
123. Remember
124. d
125. 10
126. Derive the equations
for FM & PM waves?
