![]() ![]() The composite signal can be decomposed into simpler signals.The simple signal cannot be decomposed into simpler signals.The periodic signal can be further classified into simple and composite signals.The periodic signal forms a specific pattern. A periodic signal is a signal that repeats itself after a particular time interval.Analog and digital signals can be further classified into periodic as well as non-periodic signals:.The curved signal that represents infinite values is the analog signal and the vertical lines that represent the sudden change of the values represent the digital signal. Observing the figure above we can see both the analog and the digital signals. The vertical axis is used to represent the strength of the signal and the horizontal axis is used to represent the range of the time over which the signal is represented. ![]() To represent a signal may it be analog or digital we can plot them on the pair of the perpendicular axis. However, the digital data presents only limited valued and the values can be defined easily. An Analog signal can present an infinite number of values within a specified range. Like data, signals can also be analog or digital. All the hands of the clock keep on rotating continuously and keep on giving continuous information. You all must have the analog clock that is comprised of a minute hand, a second hand, and an hour’s hand. We have a popular example with which we can understand the difference between analog and digital data easily. As digital data is discrete it can be counted and has a finite value. The analogous data is continuous and the digital data is discrete. Analog and Digitalĭata can be in both the forms analog as well as digital. Now the transmission media accepts signals and transmits it’s over the physical path. The image first has to be changed to a form that the transmission network can accept. Let us take an example you have to send an image to the receiver. It has to be first converted into signals so that we can transmit it over the network. But the data that is understandable by a person or an application cannot be transmitted as it is on the transmission network. If we say that there is a sender who has some data to be transmitted to the receiver.
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