ASK in Digital Modulation Techniques - MCQs with answers

ASK in Digital Modulation Techniques - MCQs with answers


Q1. In On- Off keying, the carrier signal is transmitted with signal value 1 and '0' indicates

a) No carrier
b) Half the carrier amplitude
c) Amplitude of modulating signal
d) None of the above

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ANSWER: a) No carrier



Q2. ASK modulated signal has the bandwidth

a) Same as the bandwidth of baseband signal
b) Half the bandwidth of baseband signal
c) Double the bandwidth of baseband signal
d) None of the above

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ANSWER: a) Same as the bandwidth of baseband signal



Q3. Coherent detection of binary ASK signal requires

a) Phase synchronization
b) Timing synchronization
c) Amplitude synchronization
d) Both a) and b)

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ANSWER: d) Both a) and b)


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