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This article is to share with you about which signals in computer networks belong to analog signals. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

All kinds of physical quantities in the actual production and life, such as the image taken by the camera, the sound recorded by the tape recorder, the pressure, flow velocity, rotational speed, humidity and so on recorded by the workshop control room are all analog signals. An analog signal is a signal in which the amplitude, frequency, or phase of the signal changes continuously over time.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

Analog signal refers to the information expressed by continuously changing physical quantities, whose amplitude, frequency, or phase change continuously with time, or in a continuous time interval, the characteristic quantity of its representative information can be presented as a signal of any value at any moment.

All kinds of physical quantities in the actual production and life, such as the image taken by the camera, the sound recorded by the tape recorder, the pressure, flow velocity, rotational speed, humidity and so on recorded by the workshop control room are all analog signals.

In the process of analog signal transmission, the information signal is first converted into an almost "identical" fluctuating electrical signal (so it is called "analog"), and then transmitted by wired or wireless means. After the electrical signal is received, it is restored to the information signal through the receiving device.

Extended data:

The main advantage of analog signal is its accurate resolution. Ideally, it has infinite resolution. Compared with digital signal, the information density of analog signal is higher. Because there is no quantization error, it can describe the real value of physical quantities in nature as close as possible.

Another advantage of analog signals is that when the same effect is achieved, analog signal processing is simpler than digital signal processing. Analog signal processing can be realized directly through analog circuit components (such as operational amplifiers, etc.), while digital signal processing often involves complex algorithms, and even requires a special digital signal processor.

The main disadvantage of analog signal is that it is always affected by noise. After the signal is copied many times, or after long distance transmission, the impact of these random noises may become very significant. In electricity, the use of ground shielding (shield), good line contact, and the use of coaxial cable or twisted pair can alleviate these negative effects to some extent.

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