Question 81 : Greater the redundancy lesser is the bandwidth expansion.
1. True
2. False
3.
4.
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Question 82 : A PWM signal can be generated by
1. An astable multi vibrator
2. A monostable multi vibrator
3. Integrating a PPM signal
4. Differentiating a PPM signal
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Question 83 : Which modulation is the most efficient one?
1. BPSK
2. BFSK
3. QPSK
4. QAM
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Question 84 : QAM is a combination of
1. ASK and FSK
2. ASK and PSK
3. PSK and FSK
4. None of the mentioned
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Question 85 : Code's redundancy is given as
1. n/k
2. k/n
3. nk
4. None of the mentioned
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Question 86 : In M-ary FSK, as M increases error
1. Increases
2. Decreases
3. Does not get effected
4. Cannot be determined
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Question 87 : For which quantization process is used?
1. Amplitude discretization
2. Time discretization
3. Amplitude & Time discretization
4. None of the mentioned
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Question 88 : Which is called as on-off keying?
1. Amplitude shift keying
2. Uni-polar PAM
3. Amplitude shift keying & Uni-polar PAM
4. None of the mentioned
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Question 89 : In non coherent reception _____ is measured.
1. Phase
2. Energy
3. Power
4. None of the mentioned
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Question 90 : Which has 50% maximum power efficiency?
1. Class A
2. Class B
3. Class AB
4. None of the mentioned
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