Subject Code: 2161704
GUJARAT TECHNOLOGICAL UNIVERSITY
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SEMESTER-VI(NEW) — EXAMINATION — SUMMER 2019
Subject Name: Analog and Digital Communication
Time: 10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1
(a) Give Classification of Noise. [03]
(b) Explain Sampling Theorem. Define Range of Frequencies in AM and FM. [04]
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(c) Describe OSI Model Architecture in detail. [07]
Q.2
(a) Define Modulation and Classify various modulation techniques. [03]
(b) Explain Adaptive Delta Modulation. [04]
(c) List various types of error detection and correction methods. [07]
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OR
(c) What is the function of modulator? Explain balance modulator with its diagram. [07]
Q.3
(a) Explain working principle of fiber optics. [03]
(b) Derive the formula for instantaneous value of FM voltage and define the modulation index. [04]
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(c) Define Noise Figure and explain noise figure calculation. [07]
OR
Q.3
(a) Explain importance of DTE and DCE in Data Communication. [03]
(b) Explain wave division multiplexing in Fiber. [04]
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(c) List Digital Modulation Techniques. Explain ASK and PSK in Detail. [07]
Q.4
(a) Draw System Network Architecture and explain Function of SNA. [03]
(b) Compare RS 422 and RS 423 Interface Standards. [04]
(c) Explain IEEE 802.5 Token Ring. [07]
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OR
Q.4
(a) Compare Amplitude Modulation and Frequency Modulation. [03]
(b) What is the difference between synchronous and asynchronous transmission? [04]
(c) Explain Pulse Code Modulation in detail. [07]
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Q.5
(a) List and Draw different DATA Topologies. [03]
(b) Compare Metropolitan Area Network and Local Area Network. [04]
(c) List different Pulse Modulation Techniques. Explain PWM in detail. [07]
OR
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Q.5
(a) Derive Equation of Power of Amplitude Modulation Wave. [03]
(b) Explain Data Link Layer Protocol in brief. [04]
(c) Define Multiplexing and Demultiplexing. List types of Multiplexing. Explain FDM with diagram, its advantages and disadvantages. [07]
Date: 16/05/2019
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Total Marks: 70
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
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