When someone viciously masks the lens, or the output video is in one-color due to the environmentslight change, the system can alert you to guarantee video continuity. From mainmenu->Setting->Video detect->Tampering, you can see tampering interface is shown as in Figure 3-79.You can enable “Alarm output “or “Show message” function when tampering alarm occurs. Sensitivity: The value ranges from 1 to 6. It mainly concerns the brightness. The level 6 has thehigher sensitivity than level 1. The default setup is 3.Tips:You can enable preset/tour/pattern activation operation when video loss occurs.Please refer to chapter 3.10.1.1 motion detection for detailed information.Note: In Detect interface, copy/paste function is only valid for the same type, which means you can notcopy a channel setup in video loss mode to tampering mode. About Default function. Since detection channel and detection type may not be the same, systemcan only restore default setup of current detect type. For example, if you click Default button atthe tampering interface, you can only restore default tampering setup. It is null for other detecttypes. System only enables tampering function during the period you set here. It is null for motion detector video loss type.Figure 3-793.10.1.4 Video diagnosisFrom main menu->Setting->Video detect->Video diagnosis, you can see the interface is shown as inFigure 3-78. This function allows you to be informed when video is blurry, over exposure or color castoccurs. You can enable alarm output channel and then enable show message function.You can refer to chapter 3.10.1.1Motion detect for detailed information.86
