Optiview DVR - Manual (Page 11)

User’s Manual
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allowable temperature of operating environment is 40°C.
The unit utilizes heat-conducting techniques to transfer internal heat to the
case, especially to the bottom side of the unit.
NOTE: Be sure not to remove the rubber feet, and always leave a
space for air ventilation on the unit’s bottom side.
2.2 Selecting Video Format
The Versatile MPEG-4 DVR is designed to operate under either NTSC or
PAL video formats. Please contact with a qualified service person to perform
the installation procedure.
2.3 Connecting Devices to the Unit
This section lists some notices that should be given before making any
connections to the Versatile MPEG-4 DVR.
NOTE: Connect short-term devices, such as USB ThumbDrive, USB
CD-RW, USB Hard Disk Drive, etc., only after the unit is successfully
powered up.
Connecting Required Devices
Before power up the unit, you should connect cameras and a main monitor to
the unit for basic operation. If needed, connect a call monitor for displaying full
screen video of all installed cameras in sequence.
Connecting Short-term Device
If you plan to install any short-term devices to the Versatile MPEG-4 DVR
and use them as part of the unit system, such as USB CD-RW, USB Hard
Disk Drive, etc. Make sure connecting those devices only during the unit is
powered up. Because Versatile MPEG-4 DVR can recognize the external
devices only after the power-up process are completely.