ELRO FA420DVR 4-ch digital recorder + 500 gb hard disc USERS MANUAL - Manual (Page 38)

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Figure 4.8 Video Masking
To set: refer to Chapter 4.3.1 Motion Detection.
4.3.3 Video Loss
When DVR is unable to receive a channel video signal, it will activate the video loss alarm and
coordinate functions.
Note: Advanced key is the same as the right mouse button.
Figure 4.9 Video Loss
To set: refer to Chapter 4.3.1 Motion Detection.