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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 11
41.
The output VR of the ratio detector is related with the output VF of similar Foster-Seeley discriminator as follows.
VR = VF
VR < VF
VR = 2VF
VF = 2VR
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
In grid bias modulation system the power required for modulating amplifier
is negligibly low since grid is negative
is large as compared to that for plate modulation
is almost the same as compared with plate modulation
is small as compared to that for plate modulation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
In spread spectrum technique
a modulated signal is modulated again
a modulated signal is modulated twice again
the power of a modulated signal is increased
the noise component of a modulated signal is decreased
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
QAM stands for
Quasi-Amplitude Modulation
Quadrature Angle Modulation
Quadrature Amplitude Modulation
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The bandwidth required for amplitude modulation is
half the frequency of modulating signal
equal to the frequency of modulating signal
twice the frequency of modulating signal
four times the frequency of modulating signal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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