Electrical measurements — Quiz

Digital Communications MCQs set-4

50 questions · Test your knowledge

1 The main sources of corruption are
2 The distortion in quantization is called as
3 In quantization process, the amount of quantization noise is _______________ to number of levels.
4 Saturation noises can be avoided or reduced by
5 Timing jitter can be reduced by
6 The reasons for the threshold effect are
7 When channel bandwidth is greater than the pulse bandwidth, it causes
8 The _____________ corresponds to average quantization noise power.
9 Signal to noise ratio increases as ___________ increases.
10 Signal to noise ratio is infinite when
11 The length of the code-word obtained by encoding quantized sample is equal to
12 Quantization noise can be reduced by ________ the number of levels.
13 In PCM encoding, quantization level varies as a function of ________
14 What is bit depth?
15 Choosing a discrete value that is near but not exactly at the analog signal level leads to
16 In PCM the samples are dependent on ________
17 DPCM encodes the PCM values based on
18 Delta modulation uses _____ bits per sample.
19 Sample resolution for LPCM ____ bits per sample.
20 Adaptive DPCM is used to
21 The size of the quantile interval is called as
22 Uniform quantization provides better quantization for
23 Non uniform quantization provides better quantization for
24 In non uniform quantization, the quantization noise is _______ to signal size.
25 The output SNR can be made independent of input signal level by using
26 Companding is the process of
27 Which value of μ corresponds to linear amplification?
28 What is the standard value of μ in μ-law ?
29 The standard value of A in A-law is
30 Which type of quantization is most preferable for audio signals for a human ear?
31 Which waveforms are also called as line codes?
32 When pulse code modulation is applied to non binary symbols we obtain waveform called as
33 Examples of PCM waveforms are
34 Which type is used and preferred in digital logic circuits?
35 Which method is called as differential encoding?
36 Which method is preferred in magnetic tape recording?
37 NRZ-S is complement of _______
38 The return to zero waveform consists of
39 Phase encoded group consists of
40 In which waveform logic 1 is represented by half bit wide pulse and logic 0 is represented by absence of pulse?
41 In which waveform logic 1 and logic 0 are represented by opposite one half bit wide pulses?
42 In which waveform logic 1 is represented by equal amplitude alternating pulses?
43 Application of phase encoded binary signals are
44 In which waveform one is represented by half bit wide pulse positioned during the first half and zero is represented by half bit wide pulse positioned in the second half?
45 Which binary waveform uses three levels?
46 Which waveform type has the feature of clocking?
47 Which waveform has the feature of error detection?
48 Which waveform scheme introduces bandwidth compression?
49 Which waveform type has better noise immunity?
50 In pulse modulation, reciprocal of T(time) is
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