Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 6th Sem 2161704 Analog And Digital Communication Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? VI EXAMINATION ? SUMMER 2020
Subject Code: 2161704 Date:26/10/2020
Subject Name: Analog and Digital Communication
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Derive Equation for AM wave.
03
(b) Explain need of modulation.
04
(c) Compare AM, FM and PM system in detail
07
Q.2 (a) How does return to zero and non return to zero binary data forms
03
differ?
(b) Compare RS 422 and RS 423 interface standards.
04
(c) Classify noise and explain noise in detail.
07
OR
(c) Describe RS 449 interface standard.
07
Q.3 (a) Define following terms
03
i. Network Interface card
ii. Companding
iii. Cyclic redundancy check
(b) Discuss the pre-emphasis & De-emphasis.
04
(c) Explain frequency shift keying and application of it in detail.
07
OR
Q.3 (a) Define methods for error detection and error correction.
03
(b) Write a note on noise triangle with reference to FM.
04
(c) Define data terminal and data communication equipments.
07
Q.4 (a) Explain ASK with waveforms
03
(b) Define Serial and Encoded data formats.
04
(c) Give basic concepts of light propagation for fiber cable design.
07
OR
Q.4 (a) Explain FSK with waveforms
03
(b) Discuss advantages and disadvantages of communication using
04
optical fiber.
(c) Write about SONET topology and SONET frame.
07
Q.5 (a) Define IEEE 802.6 Metropolitan Area Network
03
(b) Describe Time Division Multiple Access.
04
(c) Explain wireless LANs using CSMA/CA.
07
OR
Q.5 (a) Define different network topologies.
03
(b) Compare frequency modulation with phase modulation
04
(c) Briefly describe OSI model architecture.
07
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This post was last modified on 04 March 2021