PHYSICAL LAYER AND TRANSMISSION MEDIA
DATA AND SIGNALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Spectrum
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Bandwidth
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Period
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Phase
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Detailed explanation-1: -Spectrum-The range of frequencies that a signal spans from minimum to maximum. Human speech: 300 Hz to 3100 Hz. Bandwidth-The absolute value of the difference between the lowest and highest frequencies of a signal. Human speech: 2800 Hz. 15.
Detailed explanation-2: -Bandwidth is the portion of the spectrum that a given telecommunications system can use. For example, a system that operates on frequencies between 150 and 200 MHz has a bandwidth of 50 megahertz. An important distinction in spectrum technology is the difference between narrowband and broadband.
Detailed explanation-3: -Bandwidth of a channel is the range of frequencies available for transmission of data through that channel. Higher the bandwidth, higher the data transfer rate. Normally, bandwidth is the difference of maximum and minimum frequency contained in the composite signals. Bandwidth is measured in Hertz (Hz). 1 KHz =1000 Hz.