JMM 102 Lecture Notes - Lecture 13: Very High Frequency, Dumont Television Network, Carrier Wave
4 Apr 2017
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Document Summary
Transduction: transduction: the process of changing one form of energy into another. Electromagnetism: all forms of electromagnetic energy share three fundamental characteristics, they radiate outward from a source without benefit of any discernible physical vehicle. (ripples, they travel at the same velocity, they have the properties of waves. Audio waves vs. electromagnetic waves: audio (sound) waves propagate mechanically and require a medium, such as air or water, radio (electromagnetic) waves propagate electromagnetically, allowing them to travel through a vacuum and many physical materials. Spectrum management: how do we keep track of all those am, fm, and television frequencies, the fcc controls licenses, assigned frequencies, operating hours, power, antenna height and design, etc. Wavelength: the distance between two corresponding waves. Frequency: the number of waves that pass a given (stationary) point in one second, 1 wave = 1 hz = frequency, 1,000 waves = 1 khz, 1,000,000 waves = 1 mhz, 1,000,000,000, waves = 1 ghz.
