14
Video Output Connection Information
Video output includes a BNC (PAL/NTSC1.0VP-P
，
75Ω
）
output, a VGA output, and a HDMI output. The system
supports BNC, VGA and HDMI output at the same time.
When you are using pc 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 your DVR in proper working condition.
•
Keep it away from strong electromagnetic interference DVRs.
Using a TV as video output DVR is not a reliable substitution method. When using a TV as a video output DVR, it is
advised to turn off the TV from time to time to ensure its longevity. The use of a low-quality TV may result in the
damage of the DVR.
3.3.3 Audio Input/Output Connections
Audio Input Connection Information
The DVR audio input ports uses a BNC type connection.
Due to high impedance of audio input, please use an active sound microphone to get the best audio quality.
Audio transmission is like video transmission. Try to avoid interference, look out for dry joints, loose contacts, and
keep the audio DVRs and cables away from power lines.
Audio Output Connection Information
The audio output signal parameter is usually over 200mv 1KΩ (BNC or RCA).
It can directly connect to a low impedance earphone, active speaker, or amplifier-drive audio output DVR.
If the speaker and the microphone cannot be separated spatially, it may create a feedback loop. In this case you
can adopt the following measures:
•
Use a better directional microphone.
•
Reduce the volume of the speaker.
•
Using more sound-absorbing materials in the surrounding area can reduce voice echo and improve the acoustic
environment.
Adjust the layout of the audio output cables to reduce the occurrence of a feedback loop.
3.3.4. USB Port
On the DVR there is a standard USB port. For information on which DVRs are supported by this USB port, please
see
Appendix F
.
3.4 DVR Assembly Guide
Before setting up the DVR, you will need the following items.