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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 24
46.
Transistor T1 operates at 30 kHz and T2 operates at 300 Hz. The flicker noise is
not depend on frequency
T1 > T2
T1 = T2
T1 < T2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
A pre-emphasis circuit provides extra noise immunity by
converting the phase modulation to frequency modulation
pre-amplifying the whole audio band
boosting the base frequencies
amplifying the higher audio frequencies
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
A tape recorder and deck are entirely similar.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
The antenna current of an AM transmitter is 8 A. When only the carrier is sent, but it increases to 8.93 A. When the carrier is sinusoidally modulated. The percentage modulation is nearly
90%
80%
75%
70%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.

Assertion (A): SSB systems generally have duplex operation

Reason (R): SSB systems are generally used in two way communication.

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.
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