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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 13
26.
In filter system of sideband suppression the advantage of using mechanical filter is
smaller size
good bandpass
good attenuation characteristics
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Costa's receiver is used for
coherent detection of AM-SC signal
asynchronous detection of AM-SC signal
amplitude modulation of signal
frequency modulation of signal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
What is typical bandwidths of a 2-wire telephone line?
300 Hz to 3.4 kHz
20 Hz to 4 kHz
dc to 4 kHz
20 Hz to 20 kHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
In a television transmitter, the output stage is most likely to be
screen modulated class C amplifier
plate modulated class C amplifier
grid modulated class A amplifier
grid modulated class C amplifier
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Modulation index of a AM wave is measured using oscilloscope. The display on the CRO is as shown in figure it can be concluded that
the output wave is distorted
the output wave is under modulated
the modulation index is 100%
the modulation index is 50%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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