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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Amplitude
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Phase
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Frequency
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Period
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Detailed explanation-1: -The frequency is the number of times a signal makes a complete cycle within a given time frame. Spectrum-The range of frequencies that a signal spans from minimum to maximum. Bandwidth-The absolute value of the difference between the lowest and highest frequencies of a signal.
Detailed explanation-2: -Bandwidth is a key concept in many telecommunications applications. In radio communications, for example, bandwidth is the frequency range occupied by a modulated carrier signal. An FM radio receiver’s tuner spans a limited range of frequencies.
Detailed explanation-3: -The frequency of a signal tells us how many times the signal repeats itself during one second. Units of frequency are in cycles per second, or Hertz (abbreviated as Hz). Therefore, a signal with a frequency of 100Hz goes through 100 cycles (periods) in one second-the period of the signal is 0.01 seconds.