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ESE EC : Communications Champion Quiz 4
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Question 1
Which one of the following scheme is a digital modulation technique?
Question 2
Which is the most important sub-system for recovering and reconstructing signals in a TDM system?
Question 3
An analog signal has significant spectral components from 1 kHz to 5 kHz. What is the Nyquist sampling rate for this signal?
Question 4
Signal 
At what sampling frequency should this signal be sampled to avoid aliasing?
At what sampling frequency should this signal be sampled to avoid aliasing?
Question 5
A continuous signal has voltage range –2V to +2V. If this is mid-tread quantized to 8 bits, what would be the step size of the resulting signal?
Question 6
Minimum sampling frequency required to reconstruct
is
is Question 7
The Nyquist rate for the signal.
is
is Question 8
A 13 bit PCM system performance is better than an 8 bit PCM system because.
Question 9
Which of the following statements about the matched filter in a communication receive are correct?
1). Its impulse response depends on the signal shape.
2). It maximizes the SNR at the detection instant.
3). It produces ISI.
4). It may produce phase error if synchronization is improper.
Select the correct answer from the codes given below:
1). Its impulse response depends on the signal shape.
2). It maximizes the SNR at the detection instant.
3). It produces ISI.
4). It may produce phase error if synchronization is improper.
Select the correct answer from the codes given below:
Question 10
Multiplexing is possible if signals are sampled. Two signals have bandwidth A = 0 to 4 kHz and B = 0 to 8 kHz respectively. The sampling frequency chosen is 12 kHz. Which one of the following is correct?
This choice of the sampling frequency:
This choice of the sampling frequency:
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Apr 26ESE & GATE EC
