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Viola M4BL User Manual - Astra Security Systems Ltd

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3. InstallationsThe installations described below should be made by qualified service personnel orsystem installers.3.1 Basic ConnectionsPlease refer to the following diagram for the connections.Please make sure to set the NTSC/PAL Selector Switch on the main boardaccording to the local TV system for the system to work correctly.• CamerasConnect the camera video input connectors to the video outputs from systemcameras or other composite video sources via coaxial cables. The internal 75Ωtermination is always ON.• Main monitorConnect the main monitor output connector (BNC) to a surveillance TV monitor,or connect the VGA output connector to a VGA monitor. The TV/VGAmonitor displays selected live or recorded cameras in any available split windowformat. Please note there won’t be video signal for MAIN VIDEO BNCconnector if VGA is connected.• PowerConnect DC 12V power source to DC 12V.- 13 -

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