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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 20
26.
Square law modulators utilise
linear range of V-I characteristics of a diode
linear range of V-I characteristics of a triode
non-linear region of V-I dynamic characteristics of a diode
non-linear region of V-I dynamic characteristics of a triode
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Which of the following is a disadvantage of Vestigial Sideband (VSB) system?
Low video frequencies are attenuated
Bandwidth is conserved resulting in a saving of 2 MHz per channel over DSB system
It results in a power boost of two video frequencies
It possess the advantages of both DSB and SSB system
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The maximum permissible distance between two samples of a 2 kHz signal is
1000 μ sec
500 μ sec
250 μ sec
2000 sec
Answer: Option
Explanation:

.

29.
When the video signal is applied to the picture tube in a TV receiver, the strength of video signal is about
1000 V
200 V
50 V
1 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
In the above case if the modulating frequency is increased to 20 kHz the bandwidth will be
0.05 MHz
1 MHz
2 MHz
4 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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