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Electronics Engineering Objective Questions
{ Radar Engineering and Satellite Communication }
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Electronics Engineering
// Radar Engineering and Satellite Communication
43. VOR stands for
A. VHF Omni range
B. visually operated radar
C. voltage output of regulator
D. none of the above
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44. The `COHO' in MTI radar operates at the
A. received frequency
B. pulse repetition frequency
C. transmitted frequency
D. intermediate frequency
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45. The Doppler shift Af is given by
A.
B.
C.
D.
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46. Radar transmits pulsed electromagnetic energy because
A. it is easy to mearure the direction of the target
B. it provides a very ready measurement of range
C. it is very easy to identify the targets
D. none of above
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47. A high noise figure in a receiver means
A. poor minimum detectable signal
B. good detectable signal
C. receiver bandwidth is reduced
D. high power loss
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48. Which of the following is the biggest disadvantages ofCW Doppler radar?
A. it does not give the target velocity
B. it does not give the target position
C. Atransponder is required at the target
D. it does not give the target range
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49. The function of the quartz delay line in a MTI radar is to
A. help in subtracting a complete scan from the previous scan
B. match the phase of the coho and the output oscillator
C. match the phase of the coho and the stabo
D. delay a sweep so that the next sweep can be subtracted from it
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