广播系统安装技术交底-北京建工集团.doc

  1  范围
    本工艺标准适用于建筑物内的广播系统安装工程。
    2  施工准备
    2.1  材料设备要求：
    2.1.1  喇叭（扬声器）：有电动式、静电式、电磁式和离子式等多种。其中电动式扬声器应用最广，它又分纸盒扬声器和号筒扬声器两种。选用时应根据设计要求的规格型号，注意标称功率和阻抗等参数，并有产品合格证。
    2.1.2  声箱：它包括喇叭（扬声器）、箱体、护罩等附件，是定型产品，选用时应符合设计要求的规格型号，并有产品合格证。
    2.1.3  线间变压器（输送变压器）。它用于扩音机与扬声器之间进行阻抗变换，扩音机输出端为高阻抗输出，扬声器端为低阻抗匹配。选用时应符合设计要求的规格型号，并有产品合格证。
    2.1.4  分线箱、端子箱：干路与支路分线路之用，箱体采用定型产品。并附有产品合格证。
    2.1.5  控制器：控制音量大小的装置，应选用定型产品，并有产品合格证。
    2.1.6  外接插座：为广播专用插座，采用定型产品并附有产品合格证。
    2.1.7  扩音机：它是扩声系统主机，应根据扩声系统的音质标准和所需容量选择相应等级和规格的产品。根据设计要求进行选择，并有产品合格证。
    2.1.8  增音机：前级增音机又称调音盘，应根据设计要求选用定型产品，并有产品合格证。
    2.1.9  声频处理设备：它包括频率均衡器、人工混响器、延时器、压缩器、限幅器以及噪声增益自动控制器等。应根据设计要求选用定型产品，并有产品合格证。
    2.1.10  常用连线规格见表3-47。
1 Scope
    This technology is applicable to the building's public address system installation.
    2 construction preparation
    2.1 Materials and equipment requirements:
    2.1.1 Speaker (Speaker): There are electric, electrostatic, electromagnetic, and ion type and so on. Of which the most widely used electric-powered loudspeaker, it points the speaker box and two horn speakers. Selection shall be based on design requirements and specifications, the attention to the nominal power and impedance parameters, and a product certification.
    2.1.2 Voice box: it includes speakers (speaker), casing, shields and other accessories, is the styling products, use should meet the design requirements and specifications, and a product certification.
    2.1.3 The line between the transformer (transmission transformer). It is used between the amplifiers and speaker impedance conversion, amplifiers output is high impedance output, low impedance matching speaker terminal. Selected should meet the design requirements and specifications, and a product certification.
    2.1.4 distribution boxes, terminal boxes: distributors and sub-branch lines used, with box shaped products. Together with product certification.
    2.1.5 Controller: volume control, the device should be used in styling products, and a product certification.
    2.1.6 External Control Terminals: for the broadcast special socket, use styling products together with product certification.
    2.1.7 amplifiers: it is the main PA system, PA system should be based on the required quality standards and select the appropriate level of capacity and specifications. Selected according to design requirements, and have a product certificate.
    2.1.8 repeater: repeater, also known as pre-class tuning plate, should be selected according to shape product design requirements, and have product certification.
    2.1.9 audio processing equipment: It includes the frequency equalizer, artificial reverb, delay, compressors, limiters and noise gain automatic controllers. Design requirements should be based on stereotypes selected products, and have a product certificate.
    2.1.10 connection specification used in Table 3-47.