IC Realtime Specialty: 4-CH H.264E CUBE REAL-TIME DVR with BUILT-IN 5.6 LCD - Manual (Page 24)

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Position the unit to allow for cable and power cord clearance at the rear of the unit.
Be sure that the air flow around the unit is not obstructed.
3.4.2 Rack
Mounting
ATM series DVR is suitable for ATM special rack. The dimension is: 200（W）×130
（
H）×270mm（L）. The extension series support max 4 HDDs. Its dimension is:
200Ч130Ч410mm.
The DVR occupies two rack units of vertical rack space.
The hardware necessary to mount the DVR into a rack is supplied with the unit.
Install the cabinet in ventilated place. Avoid extreme heat, humid or dusty conditions.
You can use a soft dry brush to clean opening outlet, cooling fan and etc regularly.
3.5 Connecting Power Supply
Please check input voltage and device power button match or not.
We recommend you use UPS to guarantee steady operation, DVR life span, and
other peripheral equipments operation such as cameras.
3.6 Connecting Video Input and Output Devices
3.6.1 Connecting Video Input
The DVR automatically detects the video standard (PAL or NTSC) whenever you
connect a video input. It accepts color, black-and-white and analog video.
NOTE:
z
Enabling line lock on cameras may cause video distortion. There may be noise in
the camera’s power source. If video from one or more cameras is distorted, we
recommend you disable line lock on the camera as your first troubleshooting step.
z If a video distribution amplifier is installed between the video source and the DVR,
do not set the output video level above 1 Vp-p.
To connect each video input:
1. Connect a coaxial cable to the camera or other analog video source.
2. Connect the coaxial cable to the video in connector on the rear panel.
Please refer to Figure 3-1 for more information.
NOTE:
You need to use a BNC installation tool to connect coaxial cables to the rear panel.