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Previous Year Exam Questions of Radar and TV Engineering of bput - RTV by Verified Writer

  • Radar and TV Engineering - RTV
  • 2017
  • PYQ
  • Biju Patnaik University of Technology BPUT - BPUT
  • Electronics and Instrumentation Engineering
  • B.Tech
  • 12 Offline Downloads
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Registration No: Total Number of Pages: 02 B.Tech. PEI5J001 5th Semester Regular Examination 2017-18 Radar & TV Engineering BRANCH: AEIE, EIE, IEE Time: 3 Hours Max Marks: 100 Q.CODE: B393 Answer Question No.1 and 2 which are compulsory and any four from the rest. 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) Answer the following questions: multiple type or dash fill up type The range beyond which target appears as second-time-around echo is called as___________. A radar can be operated at highest frequency of ______ , to have a maximum unambiguous range of 200nmi and no blind speeds less than 600kt. Two targets can be recognized as being resolved in range when they are separated with a distance _________. _______ radar can measure both range and velocity of a moving target. A radar has an average transmitted power is 1000W, pulse width of 1μs and pulse repetition frequency of 1500Hz. The peak power of the radar will be_____. In india TV system, the number of lines per field is a) 525 b) 625 c) 312 half d) 267 half In TV system a) Picture is AM and Sound is FM b) Picture is FM and Sound is AM c) Picture is AM and Sound is AM d) Picture is FM and Sound is FM Balun in TV receiver is located between ______ and _______. Camera signal output without sync is called as __________. Which of the following camera tubes has minimum lag? a) Vidicon b) Plumbicon c) Saticon d) Iconoscope (2 x 10) Answer the following questions: Short answer type What is the pulse repetition frequency of radar to achieve a maximum unambiguous range of 70 nmi. What for more than one p.r.f. is used in a MTI Radar. A Satellite is orbiting the earth in a circular orbit at an altitude of 5000nmi has a speed of 2.7 nmi/s. What is the Doppler frequency shift for UHF radar (450MHz). What is filterplexer in high level TV transmitter. Explain the importance of Delay Line Canceller in MTI radar. Describe the basic operation of AGC used in TV Receivers. Discuss the frequency range allocated for TV channels No. 5, No.6, No. 7 (174 to 195 MHz) with picture carrier and sound carrier position in MHz. What consideration sets the lower limit to the vertical scanning rate of a TV frame? State the specification of CCIR-B Monochrome TV System. Why G-Y signal is not selected for transmission. (2 x 10)

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Q3 a) b) Q4 a) b) Q5 a) b) Derive the radar range equation and discuss the factors affecting the choice of frequency of operation of radar system. What is blind speed in MTI Radar? A 2.5 GHz MTI radar has unambiguous range of 160km. find the first two blind speeds. (10) A VHF radar at 220 MHz has a maximum unambiguous range of 180nmi. What should be its first blind speed (in knots). What should be its first blind speed (in knots) for X-band radar at 9375 MHz. 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). What is the Doppler effect? Derive the formula for Doppler shifts. (10) 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. Consider a Pulse radar system that can detect signals with S min  10 11 mW . It uses one antenna for transmission and reception with G=35dB. It broadcasts a signal with λ = 3cm and PT  1 MW . How far it can detect a small plane with (10) (5) (5) (5)   1m 2 ? Q6 a) b) Q7 a) b) Q8 a) b) Q9 a) b) Give the block diagram of a MTI radar system and briefly explain the operation of delay line canceller. What is VSB Transmission? Why it is used for transmission of TV picture signal ? (10) With circuit diagram describe the IF section of a TV receiver. Explain how the use of a SAW filters simplifies the design of IF amplifiers. Explain with the functioning of image orthicon camera tube. State its drawback. (10) Discuss the scanning process in basic Television system. What is interlace scanning? Explain its advantages over sequential scanning. Show the video bandwidth necessary for TV transmission is approximately 5 MHz in a 625-line system. (10) How omni-directional pattern is obtained in TV transmitting antenna using Turnstile antennas? How is the directivity in the vertical plane achieved? Draw the detailed diagram of tri-nitroncolour picture tube. Discuss its working. (10) (5) (5) (5) (5)

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