Qvis IAPOLLO HDRT HD User Manual
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Contents
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© Copyright Qvis® All documentation rights reserved. 34When you are using pc-type monitor please pay attention to the following points: To defer aging, do not allow the pc monitor to run for a long time. Regular demagnetization will keep device well maintained. Keep it away from devices that produce strong electromagnetic interference.Using a TV as video output device is not a reliable substitution method. You also need to reducethe working hours and control the interference from the power supply and other devices. The lowquality TV may result in device damage.3.6 Connecting Audio Input & Output, Bidirectional Audio3.6.1 Audio InputThese series of product’s audio input port adopt a BNC port. Due to high impedance of audioinput, please use active sound pick-up. Audio transmission is similar to video transmission. Try toavoid interference, dry joint, loose contact and it shoul be kept away from high tension current.3.6.2 Audio OutputThe audio output signal parameter is usually over 200mv 1KΩ (BNC). It can directly connect to alow impedance earphone, active sound box or amplifier-drive audio output device.If the sound box and the pick-up cannot be separated spatially, it is easy to arouse squeaking. Inthis case you can adopt the following measures: Use better sound pick-up with better directing property. Reduce the volume of the sound box. Using more sound-absorbing materials in decoration can reduce voice echo and improveacoustics environment. Adjust the layout to reduce happening of the squeaking.3.7 Alarm Input and Output ConnectionPlease refer to the following sheet for alarm input and output connection. There are two alarminput types for you to select: normal open (NO) and normal close (NC).1. Alarm inputa. Please make sure the alarm input mode is grounded alarm input.b. Grounding signal is needed for alarm input.c. Alarm input needs the low level voltage signal.d. Alarm input mode can be either NC (normal Open) or NO (Normal Close) |
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