ISRO Scientist or Engineer Electronics 2006

Instructions

For the following questions answer them individually

Question 41

Two carriers of 2 GHz and 4 GHz respectively are frequency modulate by a signal of 10KHz, such that bandwith of the FM signal in the two cases are same. The peak deviation in the two cases are in the ratio of

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Question 42

The bandwidth required for QPSK modulated channel is

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Question 43

Magic T is

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Question 44

Diplexer is made of

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Question 45

The gain G of an antenna of effective area A is given by

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Question 46

If the short circuit and open circuit impedance ofa line are 5 and 20Ω respectively the characteristic impedanceis given by

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Question 47

The input impedance of short circuited line of length l where $$\frac{\lambda}{4} < l < \frac{\lambda}{2}$$, is

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Question 48

Maximum coding gain in

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Question 49

Noise figure of an amplifier depends on

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Question 50

BCH code belongs to

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