For a bit rate of 8 kbps, the best possible values of the transmitted frequencies in a coherent binary FSK system are

Electronics and Communication Engineering (ECE) : Communication Systems - Quiz(MCQ)

16 kHz and 20 kHz

20 kHz and 32 kHz

20 kHz and 40 kHz

32 kHz and 40 kHz

Correct Answer : Option (D) : 32 kHz and 40 kHz

Explanation :

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In TV scanning sequence of lines is

right to left

left to right

left to right for odd fields and right to left for even field

left to right for even fields and right to left for odd field

Correct Answer : left to right

Which of the following terms are applicable to troposcatter propagation?

SIOs

Fading

Faradays rotation

Atmospheric storms

Correct Answer : Fading

Explanation : Tropospheric scatter propagation is subject to two types of fading called Rayleigh fading (due to multipath propagation) and fading due to variations in atmospheric conditions along the propagation path.

A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about

1.3 mm

130 mm

13 mm

None of the above

Correct Answer : 13 mm

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