CS 3413 Data Communications, Fall 2004 Class Assignments - Chapter 3

1. Television signals are 6 MHz wide. How many bits per second can be sent if binary digital signals are used? What signal-to-noise ratio is needed? Answer in dB.

2. If a 4-level signal is sent over a 3-kHz channel whose signal-to-noise ratio is 30 dB, what is the maximum achievable data rate?

3. What signal-to-noise ratio is needed to put a 1.544 Mbps signal on a 4-kHz line?

4. How much bandwidth is there in 0.2 microns of spectrum at a wavelength of 2 microns? (Answer in Hz.)

5. It is desired to send a sequence of computer screen images over a data line. Assume a screen size of 1280 by 1024 and 24 bits per pixel. If 30 screen images must be sent per second, how many bits per second is this?