1. 2. 3. 4. 5. 6. Differentiate between an analog and a digital electromagnetic signal. What are three important characteristics of a periodic signal? How many radians are there in a complete circle of 360 degrees? What is the relationship between the wavelength and frequency of a sine wave? What is the relationship between a signal’s spectrum and its bandwidth? How can telephone networks use communication facilities that limit the transmission of sound to a narrow bandwidth? 7. What is attenuation? 8. How does delay distortion place a limitation on the data rate for digital data? 9. What is white noise? 10. Define channel capacity. 11. What key factors affect channel capacity?