Dahua Technology LE-L User Manual
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In
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Figure 4-19, select video loss from the type list. You can see the interface is shown as in
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Figure 4-24
X
.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 detail information. 
Figure 4-24
4.5.4 Camera Masking
When someone viciously masks lens, the system can alert you to guarantee video continuity. 
Camera masking interface is shown as in 
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Figure 4-25
X
.
Tips: 
You can enable preset/tour/pattern activation operation when video loss occurs. 
Please refer to chapter 4.5.2 motion detection for detail 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. 
