Background Information
Mark Davids, R. Stephen Rea, Paul W. Zitzewitz · 1994
At the conclusion of this unit, students will be able to :List the three major parts of a dynamic speaker.Describe the energy conversions that occur in a speaker, microphone, LED, and solar cell.Design, construct, and test a one-way telephone system.Construct, test, and explain the fundamentals of a reflection “photophone.”Construct and explain a circuit that can transmit a sound signal over a light beam produced by an LED.Define “attenuation” in a sentence. Use a mathematical example to show a calculation of attenuation.Define “bandwidth” and “carrier wave.”Apply Nyquist’s Theorem to a telephone system.Describe the fundamental differences between analog and digital signals.Identify several advantages of digital communications over analog communications.Convert an analog signal into a digital signal and visa versa.List several advantages of optical fiber over copper cable.Briefly describe the fundamentals of TDM (time domain multiplexing).