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39.

40.

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2

‘The rate of change at the output of the modulator is :
(^) Bit rate (B) Baud rate
(C) Deviation rate (D) Pulse rate

What is false for a Frequency Hopping Spread spectrum?
(A) It is not affected by near far problem
(8) It is affected by near far problem
(C) Tt has multiple frequency bands
(D) The carrier frequency randomly changes among different slots

The ratio of the bandwidth of spreaded signal to the bandwidth of the unspreaded signal is
termed as :

(A) Band rejection ratio (B) Band width factor
(C) Processing gain (D) Processing factor

In a broadcast superheteradyne receiver having no RF amplifier, the loaded Q of the antenna
coupling circuit is 100. If the intermediate frequency is 455 kHz. The rejection ratio at
25 MHz will be :

(A) 1.116 (B) 1.386

(0) 2.116 (D) 2.386

Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly
conducting ground plane. It is base fed at a frequency of 600 kHz. The radiation resistance of
the antenna in ohms is : ⋅

9,3 2
ie By. 2
5 5
2
(© = @) 2077

Diffraction of electromagnetic waves :
(A) is caused by reflections from the ground
(B) arises only with spherical wavefronts
(0) will occur when the wave pass through a large slot
(0) will occur around the edge of a sharp obstacle

The filter which provides full luminance: bandwidth without destroying precious high
frequency information :

(A) Trap filter (B) Comb filter
(C) Chroma Filter (D) Luma Filter

046/2016 8 A