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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 10
16.
The message carrying efficiency is best in
AM
FM
AM-SC
Phase modulation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
An SSB-AM signal cannot be demodulated by
Balanced modulator
Complete phase shift generator
Diode balanced modulator
Product detector
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Which of the following could be the equation for non-linear resistor shown in figure?
a + be + ce2 + de3
a - be - ce2 - de3
a + be + ce2 - de3
a + be - ce2 - de3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
The pre-emphasis circuit is used
prior to modulation
after demodulation
for low frequency components of the signal
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The modulation index of wideband FM signal is
less than unity
unity
greater than unity
nearly 0.67
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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