Data signals used for communication is divided into 2 is a
1.1.1 analog signal (Analog Signal)
1.1.2 digital signal from Al (Digital. Signal)
.The analog signal (Analog Signal) mean signal continuous data (Continuous Data) size of the signal is not constant. Change the size of the signal it gradually. The need to vary with time. The general is a sign that humans can touch.The pressure of the water, the temperature or the speed of the vehicle, etc.!
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