communication channels characteristics


Types of Communication channel Communication channel Guided (wired) Unguided (wireless) Twisted pair Coaxial cable Optical...Twisted-pair cable  One of the wires carries signal, the other is used only as a ground reference.  Number of twists per...Types in twisted pair cables  Shielded twisted-pair cable  Unshielded twisted-pair cable  Categories of Twisted-Pair Ca...Coaxial cable • Used for both analog and digital signals • Effectively used at higher data rate and higher bandwidth • For...Optical fiber Refraction and reflection Propagation modes Terrestrial microwave  Requires fewer repeaters  Use a parabolic dish to focus a narrow beam.  1-40GHz frequencies Satellite communication  Receives on one frequency, and transmits on another frequency  eg. uplink 5.925-6.425 GHz & dow...Broadcast Radio  Radio frequency range is 3kHz to 300GHz  Use broadcast radio of 30MHz - 1GHz, for:  FM radio  UHF and...

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