Atlantis 32 Channel Manual - Qvis Security

2.7 Audio and video input and output connections2.7.1 Video input connectionsThe video input port is a BNC connector plug. The type of input signal is PAL/NTSC BNC(1.0VP-P,75Ω).The video signal must be of the correct standard and have a high signal to noiseratio, low aberration and low interference. The image must be clear and havenatural color and brightness in the environment in which it is to operate.Insure the monitor signal is stable and credibleThe monitor should be installed in a suitable location where is away frombacklighting and low illumination or uses backlighting and low illuminationcompensation.The earth and power supply of the monitor and the DVR should be shared andstable.Insure the transmission line is stableThe video transmission line should be a high quality coaxial pair which is suitablefor the transmission distance. If the transmission distance is too great, you shoulduse shielded twisted pair, video compensation equipment or transmit by fiberoptics to insure the signal quality.The video signal line should be away from all electro magnetic Interference andother signal line equipment. High voltage current should be especially avoided.Insure the connection is stableThe signal and shield lines should be connected with a tight connection whichwill help avoid false signals, joint welding and oxidation.2.7.2 Video output connections and optionsThe video output is divided into PAL/NTSC BNC and VGA output (selectiveconfiguration).If you replace your Qvis monitor with a computer display, there are some issuesto take note of.1). Do not leave the display turned on for a long time.2). To ensure normal working demagnetize regularly.3). Keep the display away from electro magnetic Interference.A TV is not a suitable replacement for a video output. It can only be used for ashort period of time and is particuarly suseptabler to nearby interferance. The TVcan also damage other equipment.2.7.3 Audio signal inputThe audio port is a BNC connection.As the input impedance is high, the tone arm must be active.The audio signal line should be strong and away from any electro magneticInterference and with a credible connection which should avoid false signals andjoint welding and oxidation. High voltage current should be especially avoided.10