Download Aptitude Crack
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Communication Systems - Engineering

Q1:

Two sinusoidal signals of same amplitude and frequencies 10 kHz and 10.1 kHz are added together. The combined signal is given to an ideal frequency detector. The output of the detector is

A 0.1 kHz sinusoidal

B 10.1 kHz sinusoidal

C a linear function

D a constant

ANS:B - 10.1 kHz sinusoidal

Y(t) = A cos (2p x 104 t) + A cos (2p x 10.1 x 103 t) when passed through high pass filter, Output will be A cos (2p x 10.1 x 103 t) only.