Multiplexing and Multiplexers – Exercise – 1

Multiplexing and Multiplexers » Exercise – 1

1. Multiplexing is used in :

(a) Packet switching
(b) Circuit switching
(c) Data switching
(d) None of the mentioned

Answer
Answer : (b)
Explanation
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2. Quadrature multiplexing is

(a) same as FDM.
(b) same as TDM.
(c) a combination of FDM and TDM.
(d) the scheme where same carrier frequency is used for two different signals.

Answer
Answer : (d)
Explanation
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3. In order to separate channels in a TDM receiver, it is necessary to use :

(a) AND gates
(b) bandpass filters
(c) differentiation
(d) integration

Answer
Answer : (a)
Explanation
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4. To separate channels in an FDM receiver, it is necessary to use :

(a) AND gates
(b) bandpass filters
(c) differentiation
(d) integration

Answer
Answer : (b)
Explanation
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5. Which one of the following is not an advantage of TDM over FDM :

(a) TDM has simpler instrumentation
(b) TDM is not vulnerable in the usual sources of FDM interchannel cross talk
(c) TDM can achieve the minimum bandwidth as FDM without loss of cross talk immunity
(d) None of these

Answer
Answer : (a)
Explanation
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