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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 18
6.
Which one of the following is correct?
Coding reduces the noise in the signal
Coding deliberately introduces redundancy into messages
Coding increases the information rate
Coding increases the channel bandwidth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
A paraboloid reflector has mouth diameter D meters, wavelength λ meters. Its beam width φ is equal to
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
A balanced modulator circuit uses
two identical diodes with same V-I characteristics
two triodes with different V-I characteristics
two diodes with different V-I characteristics
a diode and a triode
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
In a television camera tube, scanning of a picture is done
line by line from left to right
line by line from right to left
line by line from top to bottom
line by line from bottom to top
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
In communication receivers the fidelity is provided by
audio stage
detector range
mixer stage
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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