problem 1: By using Nyquist theorem, compute the sampling rate for an analog signal with frequencies from 2000Hz to 6000Hz and for a signal with horizontal line in the time domain representation and for a signal with a vertical line in the time domain representation?

problem 2: A signal is sampled. Each sample represents each of the four levels. How many bits are required to represent each sample? If the sampling rate is 8000 samples per second, determine the bit rate?

problem 3: Compute the bit rate and baud rate for each kind of the modulation:

a) 6000 bps, 2-PSK
b) 4000 bps, 4-QAM
c) 4000 bps, FSK

problem 4: Compute the bandwidth for each of the given AM stations. Disregard the FCC rules:

a) Modulating signal with a bandwidth of 8 kHz.
b) Modulating signal with frequencies of 2000 to 3000 Hz.

problem 5: Compute the bandwidth needed for each of the given FM stations. Disregard FCC rules:

a) Modulating signal with a bandwidth of 12 kHz.
b) Modulating signal with frequencies of 2000 to 3000 Hz.

problem 6: Describe two modes for transmitting binary data across the link.

problem 7: What are the benefits and drawbacks of parallel transmission?

problem 8: Compare the two techniques of serial transmission. Describe the benefits and drawbacks of each.

problem 9: What are the functions of a DTE? What are the functions of the DCE? Give an illustration of each.

problem 10: What standard organizations are included in DTE-DCE interface standards? Name some popular DTE-DCE standards.