监控 拾音器的安装连接方法（Method of connection monitoring pickup installation）.doc

监控 拾音器的安装连接方法（Method of connection monitoring pickup installation） Method of connection monitoring pickup installation First, the selection of the installation location of the monitor head The monitor head can be mounted on the ceiling or installed on the side of the wall. The installation position is as close as possible to the main conversation area. For example: the interrogation room can be installed near the person in charge; the classroom can be installed near the platform; the small conference room can be installed in the center of the ceiling. Installation principle: try to approach the main conversation area as much as possible. Two 、 monitor head connection cable selection and wiring Pickup / monitor head can use ordinary 4 core telephone lines, 5 kinds of network twisted pair shielding / non shielded signal cable etc.. Considering the complex construction environment, recommend the use of 0.5mm2 section 3 core signal cable (which is a commonly used 3 x 0.5 RVVP cable) monitor head power supply by the remote centralized power supply mode (i.e. in the audio recording device / sound amplification equipment power supply), the 3 core cable used in power line respectively, the audio signal line and common ground. Shielded cable can be used in electromagnetic complex environment, and its shielding layer is connected to single ended equipment. That is, the shielding screen at one end of the monitoring head is suspended, and the shielding net at the device end is connected to the equipment (chassis). Notice: it is better to go alone when wiring. Do not use the same cable trough as the alternating current or other strong current, and try to keep away from the strong electromagnetic interference equipment such as transformer, lamp and rectifier. Three 、 connection method of power line positive electrode The power supply of the monitor head requires centralized power supply from the far end (that is, centralized power supply at the end of the audio recording equipmen