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About the advantages and disadvantages of the public address system
The public broadcasting system plays a vital role in our lives. For some government agencies and modern large enterprises, the demand for public broadcasting systems has become very large.
With the development of public broadcasting systems, we have to choose according to our own needs. First of all, let us understand the constant pressure public broadcasting system. It refers to the broadcasting system in which the front end uses a constant pressure broadcasting amplifier to amplify the audio power of the audio source through the wire and transmit it to the speaker. According to different functional requirements, a main control machine and peripheral equipment can be added at the front end. The main functions of the main control machine are automatic audio output control of the audio source, power management of peripheral equipment and amplifier, and partition management of the line output area. Of course, this type of zoning control must be based on the physical zoning of the line. The functions of peripheral equipment are auxiliary functions, such as timing management of power supply, automatic detection switching of main and standby power amplifiers, and so on. The most basic structure of this type of public address system is: audio source-power amplifier-speaker.
What are the advantages and disadvantages? First of all, the public broadcast system has high transmission stability, low failure rate, simple structure, and convenient maintenance. This is obvious to all. The area selection must be a physical partition of the line, which cannot meet the higher requirements for controlling a single broadcast point. The line can only transmit a single program source, and the disadvantage of not being able to achieve single point transmission of multiple program sources in real time still exists.
We need to combine strengths and weaknesses and look at the problem comprehensively.