从本质上来讲，这些设备只不过是安装了特殊视频卡的WindowsXP系统。
Essentially, these devices are nothing more than Windows XP systems with a special video card installed.
安装在不同地点的摄像头通过电缆连接到视频卡，然后拦截到的图像或视频被存储到系统的大硬盘上。
Cables run from cameras mounted in various locations to that video card, and the captured images or video is then stored on the system's massive hard disks.
如果使用比较旧的内核，那么必须安装video4linux软件，然后才能使用视频卡。
If you are using an older kernel, you have to install the video4linux software before your video capture will work.
这时必须取消该卡是安装，否则它将取消掉视频卡的在时间和可能被夹在范。
This must be removed when the card is installed, otherwise it will lift off of the video card over time and potentially get caught in the fan.
错误：此插槽中已安装添加式视频卡时无法使用RAC。
Error: RAC cannot be used with an add-in video card in this slot.
错误：此插槽中已安装添加式视频卡时无法使用RAC。
Error: RAC cannot be used with an add-in video card in this slot.
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