Business broadcast: the daily broadcast that the public address system broadcasts to its service area and needs to be heard by all or part of the audience. Including announcement, news, information, voice files, paging, time reporting, etc.
Emergency broadcasting: the broadcasting that the public broadcasting system releases to its service area in response to public emergencies. It includes alarm signals, information to guide the evacuation of the public, and orders from relevant departments to conduct on-site command.
What are the components of the public address system
It includes broadcast PA loudspeaker, power amplifier, transmission line and its transmission equipment, management/control equipment, paging equipment, microphone and other signal source equipment.
The broadcast transmission line is usually quite long, ranging from tens of meters to thousands of meters. In order to reduce transmission loss, the broadcast signal is transmitted in the way of high voltage/low current in principle. The broadcast power amplifier is in constant voltage output mode, and its output terminal is marked with 70V/100V and other specifications; The broadcast horn loudspeaker shall be a high resistance horn speaker, and its input terminal shall also be marked with applicable voltage specifications such as 70V/100V.
Next, we will introduce the public address system, simple broadcast system, from simple to complex.
This simple system can only release voice broadcast. If you want to play background music, broadcast news, and release recording, you can add CD, tuner (radio), MP3 player and other devices. The broadcast power amplifier is usually equipped with multiple line input interfaces, which can be easily connected with these devices.
However, many public broadcasting projects cannot be handled by all-in-one machines. More equipment should be configured and used according to the actual requirements of the project, usually including more functions.
The system is configured with multiple audio sources, partition management, programming timing, etc.
The system is configured with multiple sound sources, zone management, zone monitoring, programming timing, zone paging, fire linkage, adjacent zone alarm, etc.
Of course, if you want to achieve more complex functions, you can also configure a powerful intelligent matrix system to solve it.
Or the most advanced digital broadcasting system can be configured to solve the problem. In addition to the conventional system and intelligent matrix system, it can also realize the functions of multi-network integration, intuitive touch screen control of interface image, connection of unlimited broadcast zones, arbitrary combination of all zones, separate control interaction, various input multi-level priority, intercom function, audio source acquisition, setting authority management, operation log backup and other functions.
