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Previous Year Exam Questions for Radar and TV Engineering - RTV of 2018 - BPUT by Bput Toppers

  • Radar and TV Engineering - RTV
  • 2018
  • PYQ
  • Biju Patnaik University of Technology Rourkela Odisha - BPUT
  • Electronics and Instrumentation Engineering
  • B.Tech
  • 14 Views
  • Uploaded 8 months ago
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Registration No : Total Number of Pages : 02 B.Tech PEI5J001 5th Semester Regular Examination 2018-19 RADAR & TV ENGINEERING BRANCH : AEIE, EIE, IEE Time : 3 Hours Max Marks: 100 Q.CODE : E492 Answer Question No.1 (Part-1) which is compulsory, any EIGHT from Part-II and any TWO from Part-III. The figures in the right hand margin indicate marks. Q1 a) b) c) d) e) f) g) h) i) j) Q2 a) b) c) d) e) f) g) h) i) j) k) l) Part- I Short Answer Type Questions (Answer All-10) What do you mean by superhetrodyne receiver in radar systems? Enlist the major areas of radar applications. Why staggered PRFs are used in MTI radar. How range ambiguities can be resolved in medium prf pulse Doppler radar? A 2.5 GHz MTI radar has unambiguous range of 160km. find the first two blind speeds. What is interlace scanning in basic Television system? What is filterplexer in high level TV transmitter? Differentiate between Luminous intensity and Luminance. Why G-Y signal is not selected for transmission. What is kill factor? Part- II Focused-Short Answer Type Questions- (Answer Any Eight out of Twelve) What is plan position indicator in a typical surveillance radar display? Briefly explain the working of Bistatic CW radar. What are blind speeds in MTI radar? How can these speeds be overcome? Explain in detail. Explain GMTI radar. How can a CW radar measure both range and velocity of a moving target? Draw suitable diagram to explain this and the formula for measuring both parameters. What do you mean by monopulse tracking? Explain it with neat diagram. Differentiate between sequential lobing and conical scan. Explain the differences between positive and negative modulation. Draw the block diagram of NTSC transmitter and explain the function of each block. Discuss about the 625-line monochrome system. What are TV broadcast channels? Discuss in detail about tri-nitroncolour picture tube with neat sketch. (2 x 10) (6 x 8)

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Part-III Long Answer Type Questions (Answer Any Two out of Four) Q3 Derive the radar range equation and discuss the factors affecting the choice of frequency of operation of radar system. A Ground based surveillance radar operates at a frequency of 1300MHz. Its maximum range is 200nmi with a radar cross section of one square meter. Its antenna is 12 m wide by 4 m high with aperture efficiency of 65%. The receiver minimum detectable signal is 10^(-13) W. find the following: a) Antenna effective aperture (square meter) and antenna gain (dB) b) Peak transmitted power c) PRF to achieve max unambiguous range of 200 nmi. d) Avg. transmitted power if pulse width is 2us e) Duty cycle f) Horizontal beam width (degree) (16) Q4 What is the Doppler effect? Derive the formula for Doppler shifts. (16) A VHF radar at 220 MHz has a maximum unambiguous range of 180nmi. a) What should be its first blind speed (in knots). b) What should be its first blind speed (in knots) for X-band radar at 9375 MHz. c) what would be the unambiguous range (nmi) of X band radar of part (ii) in order to give the same blind speed you find in part (i). Q5 Explain the working of monochrome television receiver with detailed block diagram and draw the vestigial side band characteristics of TV transmitter and receiver. (16) Q6 Discuss the working of vidicon and plumbicon camera tubes with neat sketch. Enlist the limitations of both camera tubes. (16)

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