UNIT - I RADAR Q.1) Derive the radar range equation and then

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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.