User Manual

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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.
The items are not included:
● A computer monitor or TV with either an HDMI or VGA input
● A power strip with room for 4 large power plugs
It is recommended to connect all components of the system as shown below before mounting any of the cameras.
This is to ensure all components are working before any physical installation takes place. If any components are
not functioning, please contact Amcrest Support at support@amcrest or by giving us a call at 888-212-7538.
Setting up the cable connections
The following instructions will show you how to set up the cables for the DVR, cameras, as well as a monitor or TV
screen.
To set up the DVR’s cable connections, there are 6 major steps:
1. Connect a monitor or TV screen to your DVR. For purposes of this guide, we will use a VGA connection. Take a
VGA cable, and connect one end to the VGA port on your monitor/screen and the other end to the VGA port on
the back panel of your DVR.