IndiaBIX

Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 11
31.
In FM noise can be decreased by a feature that AM does not have
increasing deviation
decreasing deviation
reducing modulation index
increasing modulation index
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
In case of stabilized reactance modulator AFC system
phase modulator is converted into frequency modulation by equalizer circuit
the discriminator must have a fast time constant to provide demodulation
the higher discriminator frequency, the better oscillator frequency
the discriminator frequency must be too low, or the system will fail
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.

Assertion (A): Demodulation of SSB and AM signals is exactly similar

Reason (R): The basic SSB demodulation device is product detector.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
In shot noise
the current rises around mean value
the current rises to peak value, decreases to zero and then again rises
the current may become negative
the current is always less than the mean value
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
In VCR, the chrominance signal's frequency is
up converted during recording and down converted during playback
down converted during recording and up converted during playback
not changed during recording and playback
any of the above depending on VCR system
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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