ECE :: Communication Systems
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Which is most important subsystem for recovering and reconstructing signal in a TDM system?
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Which one of the following is an indirect way of generating FM?
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Companding is used in PCM to
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Assertion (A): In AM the amplitude of carrier is made proportional to the instantaneous amplitude of modulating wave
Reason (R): In AM, frequency of side band = frequency carrier ± frequency of modulating wave.
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Pressing a key on telephone set generates two frequencies. The basis for selection of these frequencies is
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The orbital period of a geostationary communication satellite is
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Which of the following is not true as regards communication receiver?
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Which of the following is the disadvantage of PDM and PPM?
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Frequency frogging is used in a carrier system to
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TDM
Whatsapp
Facebook
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A.
It is exactly same as radio receiver used in households
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B.
It can be used, besides communication, for detection in high frequency bridges
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C.
It is designed to perform the task of low and high frequency reception better than in household receiver
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D.
Its tuning and operation are more complicated than those in household receiver
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