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Unformatted text preview: 8. What is the difference between NRZI and NRZL? 9. Compare HDB3 with AMI, NRZL and NRZI, what is the major advantage? 10. Analog signal cannot be used to carry digital data. A. True B. False 11. Analog voice is converted to bit streams using 8 kHz sampling rate and 256-level quantization. What is the bit rate of the digital stream? A. 64kb/s B. 128kb/s C. 8kb/s D. 2048kb/s 12. In PCM, suppose the analog data's highest frequency is F, which of the following helps improving the quality of the digital signal? A. Using more levels in quantization B. Using sampling rate higher than F C. Increasing sampling rate from 2F to 3F D. Only 1 and 2 13. Nyquist channel capacity tells us that C = 2B log2 (M). Therefore, we can increase the capacity of the channel to whatever we want by increasing the quantization levels M. A. True B. False...
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- Spring '09