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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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -One of the primary shortcomings of analog data and analog signals is how difficult it is to separate noise from the original waveform. The ability to separate noise from a digital waveform is one of the great strengths of digital systems.
Detailed explanation-2: -Analog data to Analog signals − The modulation techniques such as Amplitude Modulation, Frequency Modulation and Phase Modulation of analog signals, fall under this category. Analog data to Digital signals − This process can be termed as digitization, which is done by Pulse Code Modulation PCM.
Detailed explanation-3: -The common examples of analog signals are temperature, current, voltage, voice, pressure, speed, etc. The common example of digital signal is the data store in a computer memory. The analog signals are used in land line phones, thermometer, electric fan, volume knob of a radio, etc.