IC Realtime HDVR-MX0402-1U5MP-AI2-WEB Product Manual - Page 34

Connecting to Alarm Input and Output

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The signal line and shielded wire should be installed firmly and in a secure connection. Avoid dry joints, lap welding, and oxidation. 4.2.2 Video Output Video output includes a BNC (PAL/NTSC1.0VP-P, 75Ω) output, a VGA output, and HDMI output. System supports BNC, VGA and HDMI output. When you are using a pc-type monitor to replace the monitor, please pay attention to the following points: ● To defer aging and screen burn, do not allow the pc monitor to run for a long time. ● Regular degaussing/ demagnetization will keep the device maintain a proper status. ● Keep away from strong electromagnetic interference devices. Using a TV as a video output device is not a reliable substitution method. You will also need to reduce the working hours and control the interference from the power supply and other devices. A low-quality TV may result in device damage. 4.2.3 Audio Input This series of products supports audio input via the same video BNC port for applicable video formats such as HD-AVS and CVI. Due to the high impedance of audio input, please use active sound pick-ups. Audio transmission is similar to video transmission. Try to avoid interference, dry joint, loose contact, and keep away from high tension currents. 4.2.4 Audio Output The audio output signal parameter is typically over 200mv 1KΩ (BNC or RCA). It can connect directly to a low impedance earphone, active speaker box or amplifier-drive audio output device. If the sound box and the pick-up are in too close of proximity, audio feedback noises will be generated. In this 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 improve the acoustics environment. ● Adjust the layout of the speaker and pickup to reduce squeaking. 4.3 Connecting to Alarm Input and Output Please read the following before connecting. Alarm input ● Grounding signal is needed for alarm input. ● Alarm input requires a low-level voltage signal.

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The signal line and shielded wire should be installed firmly and in a secure connection. Avoid dry
joints, lap welding, and oxidation.
4.2.2
Video Output
Video output includes a BNC (PAL/NTSC1.0V
P-P
, 75Ω) output, a VGA output, and HDMI output.
System supports BNC, VGA and HDMI output.
When you are using a pc-type monitor to replace the monitor, please pay attention to the
following points:
●
To defer aging and screen burn, do not allow the pc monitor to run for a long time.
●
Regular degaussing/ demagnetization will keep the device maintain a proper status.
●
Keep away from strong electromagnetic interference devices.
Using a TV as a video output device is not a reliable substitution method. You will also need
to reduce the working hours and control the interference from the power supply and other
devices. A low-quality TV may result in device damage.
4.2.3
Audio Input
This series of products supports audio input via the same video BNC port for applicable video
formats such as HD-AVS and CVI.
Due to the high impedance of audio input, please use active sound pick-ups.
Audio transmission is similar to video transmission. Try to avoid interference, dry joint, loose
contact, and keep away from high tension currents.
4.2.4
Audio Output
The audio output signal parameter is typically over 200mv 1KΩ (BNC or RCA). It can connect
directly to a low impedance earphone, active speaker box or amplifier-drive audio output
device.
If the sound box and the pick-up are in too close of proximity, audio feedback noises will be
generated. In this 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 improve
the acoustics environment.
●
Adjust the layout of the speaker and pickup to reduce squeaking.
4.3 Connecting to Alarm Input and Output
Please read the following before connecting.
Alarm input
●
Grounding signal is needed for alarm input.
●
Alarm input requires a low-level voltage signal.