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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
  • Electrical and Electronics Engineering
  • B.Tech
  • 210 Views
  • 3 Offline Downloads
  • Uploaded 1 year ago
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Registration No : Total Number of Pages : 02 B.Tech. PEL6D003 6th Semester Regular Examination 2017-18 RADAR & TV ENGINEERING BRANCH : EEE Time : 3 Hours Max Marks : 100 Q.CODE : C503 Answer Part-A which is compulsory and any four from Part-B. The figures in the right hand margin indicate marks. Answer all parts of a question at a place. Q1. a) b) c) d) e) f) g) h) i) j) Q2. a) b) c) d) Part – A (Answer all the questions) Answer the following questions : If the target cross section is changing, the best system for accurate tracking is (a) Lobe switching (c) Conical Scanning (b) Sequential lobing (d) Monopulse Lobe switching gives (a) Angular error (c) range (b) Velocity (d) Target size Duplexer isolates (a) Transmitter while transmitting (c) Receiver while receiving (b) Receiver while transmitting (d) Display unit Matched filter is (a) Removes AF signal (c) a high pass filter (b) Used to optimize SNR (d) Filters RF signal Pulse compression (a) Increases bandwidth (c) decreases bandwidth (b) Increases range resolution (d) increases cross range resolution The primary colors in color TV are ------------. Gamma correction is responsible for -----------. LCD displays generally employ (a) Nematic crystals (c) sematic crystals (b) Cholestreric crystals (d) twisted nematic crystals Phosphorous glow if electron hitting them are of (a) High velocity (c) low velocity (b) Zero velocity (d) none of these In a television system --------- is frequency modulated and ----------- is amplitude modulated. Answer the following questions : Short answer type : What is minimum detectable signal of radar? What is the function of a colour burst? Define bandwidth for color signal transmission. What is hits per scan? How it is related with antenna beam width and pulse repetition frequency? (2 x 10) (2 x 10)

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e) f) g) h) i) j) A radar system transmits pulses with duration of 2 and repetition rate of 1Khz. Find maximum range and minimum range of radar. Define interlaced scanning and progressive scanning. What is the purpose of an AGC circuit in a TV receiver? What is the working principle of LED display? What are its advantages over LCD displays? Why different bandwidths are assigned to Q and I signals? With a 10GHz radar if the antenna diameter is 2m, calculate the beam width of the antenna. Q3. a) b) Part – B (Answer any four questions) Draw the block diagram of a pulse radar and explain each block in detail. Derive the basic radar range equation and discuss the parameters on which it depends (10) (5) Q4. a) b) Explain the working of plasma display. Compare it with LED and LCD display. Compare additive mixing and subtractive mixing of color television. (10) (5) Q5. a) Explain in detail about detection of one sample of signal with noise, integration of pulse train and detection of fluctuating targets. Explain the basic principle of LCD television display (10) What is sequential lobing ? How sequential lobing and conical scanning helps in tracking radar. Differentiate between A scope and PPI display. (10) Draw the block diagram of a digital TV receiver giving the function of each block. Draw chromaticity diagram and explain what information can be obtained from it. (10) What is Doppler Effect? Explain the operation of MTI radar with the help of necessary sketches. Calculate the vertical and horizontal resolution for a 625 television system. If the beam diameter increases by 30% due to defocusing then calculate the degraded resolution. (10) What is the necessity of Delay Line Canceller (DLC)? Derive the frequency response of a single delay line canceller used in MTI radar. Explain false alarm and missed detection in a radar system. Describe how clutter affects radar detection. (10) b) Q6. a) b) Q7. a) b) Q8. a) b) Q9. a) b) (5) (5) (5) (5) (5)

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