GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER-VI(NEW) — EXAMINATION - SUMMER 2019
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Subject Code:2162410 Date:18/05/2019
Subject Name:Industrial Communication System
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Define Modulation. List out the advantages of modulation. 03
(b) Clearly define each of the following terms: 04
- Bit rate
- baud rate
- Communication
- Bandwidth
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(c) (1) Explain the Power relation of the AM wave with necessary 07 mathematical analysis.
(2) Calculate the maximum bit rate for a channel having bandwidth 3.1KHz and signal to noise ratio of 10dB.
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Q.2 (a) Draw the AM waveforms for with 100% modulation and with 0% 03 modulation.
(b) Explain in details about PWM. 04
(c) List out Modulation index measurement methods. Explain any one 07 with necessary circuit & suitable waveforms.
OR
(c) Compare FSK, ASK and PSK in all tabular forms. 07
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Q.3 (a) Explain in brief communication modes. 03
(b) Compare Synchronous and asynchronous transmission. 04
(c) Write a detailed note on: satellite communication. 07
OR
Q.3 (a) Explain in brief the UART receiver. 03
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(b) Sketch the transmitted sequence of pulses for RZ and NRZ for 04 Sequence of pulses: 01010011110
(c) Write a technical note on : Network Topologies. 07
Q.4 (a) An Amplifier has a Noise figure of 3dB. calculate its equivalent 03 noise temperature(assume T0=23°C).
(b) Explain the troubleshooting serial data communication circuit. 04
(c) Write a detailed note on Suppression techniques. 07
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OR
Q.4 (a) Explain in brief HART protocol. 03
(b) List the benefits of FIELDBUS and DEVICE NET system. 04
(c) Explain the theory of operation of fiber-optic cables. List the 07 limitations of fiber-optic cables.
Q.5 (a) Explain in brief about USB. 03
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(b) Differentiate balanced and unbalanced transmission lines? 04
(c) What is the protocol? Explain TCP/IP. 07
OR
Q.5 (a) Explain in brief sources of Noise. 03
(b) Explain RS-232 interface standards. 04
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(c) List MODBUS functions. Explain message format, synchronization 07 and memory notation of MODBUS protocol.
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