Draw the graph of the NRZ-L scheme using each of the following data streams, assuming that the

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Draw the graph of the NRZ-L scheme using each of the following data streams, assuming that the last signal level has been positive. From the graphs, guess the bandwidth for this scheme using the average number of changes in the signal level. Compare your guess with the corresponding entry inTable 4.1.

Characteristics Category Scheme Bandwidth (average) Costly, no self-synchronization if long Os or 1s, DC No self-synchro

a. 00000000

b. 11111111

c. 01010101

d. 00110011

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