UNIT - I RADAR Q.1) Derive the radar range equation and then discuss how does radar range depend on transmitted power, duty cycle and noise figure of transmitted power and noise figure of radar receiver. Q.2) what is meant by sequential lobbing, conical scan and simultaneous lobbing? Briefly explain them. Q.3) a. Explain with block diagram, how the MTI radar is used to track the moving targets. b. MTI radar operates at 10 GHz with a PRF of 3000 PPS. Calculate its lowest blind speed. Q.4) Define any two terms(a) Clutter (b) Tracking (c) Delay line canceller Q.5) what is working principle of CW radar? What is its limitation and how can it be overcome UNIT - II NAVIGATIONAL AIDS Q.1) Explain (a) LORAN (b) DME (c) TACAN Q.2) Write short note on Aircraft landing system. Q.3) Write short note on Aircraft Instrument system. Q.4) Why are the transmitted and received frequencies different in the interrogator and transponder beacon in DME? Q.5) what is principle of hyperbolic system of navigation? UNIT - III T.V. ENGINEERING Q.1) what do you understand by interlaced scanning? Show that interlace scanning reduces the flicker? Q.2) Draw the complete scanning sequence for 625 TV systems. Explain the necessity of taking total number of lines always odd. Q.3) a. Write short note on composite video signal. b. Briefly explain the Image Orthicon. Q. 4) What is meant by equal vertical and horizontal resolution? Q. 5) Explain with the help of suitable sketch, How video signal is developed in a vidicon camera tube . How is the vidicon different from an image orthicon and what are its special application? UNIT - IV T.V. TRANSMITTER Q. 1) Show that a total channel band width of 7MHz is necessary for successful transmission of both picture and sound signal in the 625 lines TV system? Q.2) Write short note on channel BW for color and monochrome TV transmission? Q.3) Write short note on production of R-Y, B-Y, G-Y signal, given circuit diagram also. Q.4) Draw vestigial side band frequencies for channel TV in band III specified on it sound carrier, picture carrier and color sub carrier frequencies. Q. 5) What is frequency interleaving concept? How it is utilized to color TV systems? How the modulation is done with color signals? UNIT - V T.V. RECEIVER Q. 1) Explain the working of IF amplifier and video amplifier in the TV receiver? Q.2) Explain the EHT generation and AGC? Q.3) Describe the working of monochrome TV receiver with the help of suitable block diagram? Q.4) Write short notes on a. AGC scheme b. Yagi- Uda antenna c. IF amplifier Q.5) Draw the formation of the luminance (Y) video signal with the resistance matrix from color camera output.