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Name IT 327 Dr. Lunt Homework #8 Chapter 1 Questions 2. Explain why all communications systems must have similar functions, regardless of size or distance. 4. What is the primary relationship among frequency, velocity & wavelength of an electromagnetic wave? 5. What is the propagation factor? Give typical factors for wire & cable. 7. Compare the wavelength of visible light with the wavelength of a signal in the LF band. 12. What is bandwidth? Why is it a critical resource? 13. How does available bandwidth affect the rate at which data can be transferred? How do signal and noise power affect data rates? 14. Why do the higher-frequency bands of the spectrum offer greater capacity? 15. What is the difference between simplex, duplex & half-plex communication systems? Problems 1.4 5. Determine the channel capacity for signal power of 150 W, noise power of 12 W and bandwidth of 2 kHz. 7. What is the capacity when the signal-to-noise power ration is 2000 & the bandwidth is 75 kHz?