This question is about physical layer transmission systems.

Question

a) Using a diagram, show how a logic 1 and a logic 0 are represented using Manchester encoding.

b) Using a diagram, show how the bit sequence 01110010 would be transmitted using Manchester encoding.

c) A transmission system uses a data coding scheme that defines a symbol as a voltage that can have one of EIGHT possible values. If the system operates at a transmission rate of 200 symbols per second, determine the data rate measured in:
i) Baud;

ii) Bits per second.

d) Wide Area Networks (WAN) are based on the High Level Data Link Control (HDLC). Indicate:
i) The purpose of the unique flag sequence 01111110;

ii) The purpose of the process known as zero bit insertion, or bit stuffing.

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