JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV Year TELEMETRY AND TELECONTROL Previous Question Paper (November/December - 2018 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks.
PART A
(25 Marks)
What is telemetry? List various telemetry methods.
Answer
Telemetry is the process of measuring physical quantities at a remote location and transmitting the data to a central station for monitoring or control. The primary methods include electrical (voltage/current), pneumatic, optical, radio (RF), and digital telemetry.
Explain about line and channel coding.
Answer
Line coding involves converting binary data into digital signals (pulses) suitable for transmission over a physical medium, such as NRZ, RZ, or Manchester encoding. Channel coding adds redundant bits to the data stream to detect and correct errors introduced by noise or interference during transmission, ensuring reliable data recovery.
What is IRIG standard?
Answer
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Explain about PLL and its applications.
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Explain about Zigbee features.
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Write the applications of telemetry in communications.
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Write the advantages of optical telemetry.
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List different optical sources and detectors.
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Give examples of tele control systems.
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Explain about guidance and regulation in tele control.
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PART B
Explain the working of voltage and current telemetry systems with help of neat diagrams.
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Discuss various symbols, codes and inter symbol interference used in telemetry systems.
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Draw a neat diagram pneumatic telemetry system and explain its working and mention the advantages and disadvantages of pneumatic telemetry systems.
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Explain in detail about time function pulses and modulation codes used in telemetry.
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What makes phase locked loop discriminator so popular in communication applications? What is a capture range in connection with discrimination and how is it increased in PLL discriminator?
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Draw the block diagram of TDM telemetry system and PAM telemetry system and explain in detail.
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Explain the frequency division multiplexing and De-multiplexing with help of neat diagram and discuss its advantages and disadvantages.
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Draw the block diagram of Time Division Multiplexing systems and explain how TDM system differ from FDM system.
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Explain the functioning of TT and C subsystems of a satellite communication system with help of a diagram.
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Explain the working modern telemetry using Zigbee and Ethernet and discuss their advantages and limitations.
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Explain the working of earth station system in a satellite telemetry system with help of a neat block diagram.
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Explain how interlinking can be done in the TT&C sub systems.
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How does energy loss occur in a fiber optical cable? Explain how these losses can be measured and compensated?
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Explain the coherent optical fiber communication system with help of neat diagram.
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Explain the optical fiber based communication system with neat sketch and how is the line losses can taken care of in such systems?
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Describe various sources and detectors used in optical telemetry and compare their merits and de-merits.
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Explain about analog and digital techniques used in telecontrol with suitable examples and diagrams.
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Explain the working of telecontrol system by taking specific example with the help of neat diagram.
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What are the basic components of a remote control system and explain the working of an Industrial remote control system with help of neat diagram.
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Explain the guidance and control using information theory by taking specific example.
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