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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 9
16.
A pure tone at 1000 Hz has a dB level of 40 dB. If the required dB level is 100, the number of such tones is
2.5
60
104
106
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
The spectrum of the white noise and an impulse function is similar in following aspects
both have similar magnitude spectrum
both have similar magnitude and Phase spectrum
no relation
similar phase spectrum
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
In a telephone system, the grade of service means
the quality of sound reception at the receiver telephone
the probability that a called for connection is established
the type of wires cables used for the system
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
A longwave AM broadcast transmitter needs
very small carrier power
very large carrier power
small carrier power
large carrier power
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
AGC voltage is applied to the stages which are
before the detector stage
after the detector stage
either before or after the detector stage
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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