problem 1: Describe the two kinds of biphase encoding in use on networks.

problem 2: What is the main drawback in using NRZ encoding? How do RZ encoding and biphase encoding attempt to resolve the problem?

problem 3: Compare and contrast the B8ZS and HDB3 encoding.

problem 4: List all the steps that take an analog signal to digital PCM signal.

problem 5: What are the differences between bit rate and baud rate? Give an illustration where they are similar and where they are distinct.

problem 6: How does the sampling rate influence the transmitted digital signal?

problem 7: What is the main purpose of a carrier signal in the modulation?

problem 8: How are QAM associated to the ASK and PSK?

problem 9: What are the main factors which make PSK superior to ASK?

problem 10: How does:

a) AM differ from ASK?
b) FM differs from FSK?