4.2.1 signals used in communications systems. There are two types of analog signals. And digital signal Analog signals which have a large amplitude. The variation and a continuous noise like speech and music. The digital signal is a signal that there is no continuity, called discrete digital signals are represented by voltage levels, two levels, with the indicator to zero and one, which corresponded to a binary number.
การแปล กรุณารอสักครู่..