1. In order to correctly represent an analog signal, the sampling rate must be _
ID: 1846283 • Letter: 1
Question
1. In order to correctly represent an analog signal, the sampling rate must be _____.
(a) two times the lowest frequency in the analog signal
(b) two times the highest frequency in the analog signal
(c) two times the average frequency in the analog signal
(d) four times the highest frequency in the analog signal
2. The problem of foldover distortion or aliasing occurs when _____.
(a) the sampling frequency is two times the highest frequency in the analog signal
(b) the sampling frequency is more than two times the highest frequency in the analog signal
(c) the sampling frequency is less than two times the highest frequency in the analog signal
(d) the sampling frequency is equal to the highest frequency in the analog signal
3. In order to correctly represent the analog information signal, the sampling rate must be _____.
(a) equal to the highest frequency in the analog signal
(b) two times the highest frequency in the analog signal
(c) two times the average frequency in the analog signal
(d)four times the highest frequency in the analog signal
4. The quantization error can be reduced in a PCM signal by _____.
(a) increasing the signal voltage
(b) reducing the signal voltage
(c) reducing the number of quantization levels
(d) increasing the number of quantization levels
Explanation / Answer
1) (b) two times the highest frequency in the analog signal
2) b) the sampling frequency is more than two times the highest frequency in the analog signal
3) b). two times the highest frequency in the analog signal
4) d) increasing the number of quantization levels
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