Question 21 : If we down-sample a signal x(n), then the resulting signal will be an aliased version of x(n).
1. True
2. False
3.
4.
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Question 22 : Which of the following is the advantage of sampling rate conversion by converting the signal into analog signal?
1. Less signal distortion
2. Quantization effects
3. New sampling rate can be arbitrarily selected
4. None of the mentioned
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Question 23 : The difference between the unquantized x(n) and quantized xq(n) is known as:
1. Quantization coefficient
2. Quantization ratio
3. Quantization factor
4. Quantization error
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Question 24 : Let x₁(t) and x₂(t) be periodic signals with fundamental periods T1 and T2 respectively. Which of the following must be a rational number for x(t)=x₁(t)+x₂(t) to be periodic?
1. T₁+T₂
2. T₁-T₂
3. T₁/T₂
4. T₁*T₂
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Question 25 : If the sampling rate Fs satisfies the sampling theorem, then the relation between quantization errors of analog signal(eq(t)) and discrete-time signal(eq(n)) is:
1. eq(t)=eq(n)
2. eq(t)<eq(n)
3. eq(t)>eq(n)
4. not related
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Question 26 : If x(n)=(0,1,2,3,3,0,0,0) then x(2n) is:
1. (0,2,4,6,6,0,0,0)
2. (0,1,2,3,3,0,0,0)
3. (0,2,3,0,0,0,0,0)
4. None of the mentioned
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Question 27 : The quality of output signal from a A/D converter is measured in terms of:
1. Quantization error
2. Quantization to signal noise ratio
3. Signal to quantization noise ratio
4. Conversion constant
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Question 28 : The deflection voltage of an oscilloscope is a 'deterministic'
signal. True or False?
1. True
2. False
3.
4.
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Question 29 : If 'F' is the frequency of the analog signal, then what is the minimum sampling rate required to avoid aliasing?
1. F
2. 2F
3. 3F
4. 4F
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Question 30 : Which of the following block is not required in digital processing of an RADAR signal?
1. A/D converter
2. D/A converter
3. DSP
4. All of the mentioned
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