DVR systems DVRxx04HF-A Series User Manual
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In Figure 4-20, select video loss from the type list. You can see the interface is shown as in 
Figure 4-25.This function allows you to be informed when video loss phenomenon occurred. 
You can enable alarm output channel and then enable show message function. 
Tips: 
You can enable preset activation operation when video loss occurs. 
Please refer to chapter 4.5.2 motion detection for detailed information. 
Figure 4-25
4.5.4 Camera Masking
When someone viciously masks the lens, or the output video is in one-color due to the 
environments light change, the system can alert you to guarantee video continuity. Camera 
masking interface is shown as in Figure 4-26. 
Tips: 
You can enable preset/tour/pattern activation operation when video loss occurs. 
Please refer to chapter 4.5.2 motion detection for detailed information. 
Note: 
In Detect interface, copy/paste function is only valid for the same type, which means you can 
not copy a channel setup in video loss mode to camera masking mode. 
Figure 4-26
