选择公共广播系统器材的注意事项（Considerations for selecting public address system equipment）.docVIP

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2017-08-16 发布于河南
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选择公共广播系统器材的注意事项（Considerations for selecting public address system equipment）.doc

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选择公共广播系统器材的注意事项（Considerations for selecting public address system equipment）

选择公共广播系统器材的注意事项（Considerations for selecting public address system equipment） Considerations for selecting public address system equipment The public broadcasting system and a sound system of general architecture pattern is different, so in the choice of broadcasting system equipment, matters needing attention are also different, the following day, teanma broadcast to share with you some practical experience in work. Audio source output device: We first from the audio output device part about, actually this part of the equipment, public broadcasting system and sound system in general is the same, only need to pay attention to the place is automatically broadcast (AUTOPLAY) function, because most of the public broadcasting system is not operated by the person in charge, it will be a total the power switch set in the system, with convenient operation, the device and system are equipped with a timer, the user will power switch closed, failed to notice this to be a separate audio output device in the power supply is turned off, or the next manual timing start device, will some unnecessary sound output, causing the trouble. Audio input device is the public broadcasting system the most difficult part of the equipment, because the audio input equipment in general will sound with the adjustment function, which in addition to integrating the audio input signal of all the outside, also responsible for the modification of the output signal after integration, and the public broadcasting system for voice signal transmission distance can be elongated and to cope with the huge number of loudspeaker system, so can not use a low impedance output by 0, 4 general audio, 8 ohm, 16 ohm ohm use, so adopt the high impedance output with carrier 0, 70V, 100V, because of the sound signal through the transformer and the sound adjusting part is easy to make the distortion. We choose to use equipment must pay special attention to whether they have a variety of input channel signal source (Chann