User Manual
Network Video Recorder User Manual   
UM NVR v4.xx 111717NA  138 
Figure 13-11 Defocus Detection 
Step 3 Select a camera to configure. 
Step 4 Check Enable Defocus Detection. 
Step 5 Optionally, check Save VCA Picture to save the captured defocus detection pictures. 
Step 6 Drag the Sensitivity slider to set the detection sensitivity. Sensitivity range: [1-100]. 
The higher the value, the more easily the defocus image will be detected. 
Step 7 Set the arming schedule. Refer to Chapter 12.1 Configuring Arming Schedule.     
Step 8 Set the linkage actions. Refer to Chapter 12.2 Configuring Alarm Linkage Actions. 
Step 9 Click Apply.   
13.12 PIR Alarm 
Purpose 
A PIR (Passive Infrared) alarm is triggered when an intruder moves within the detector vision 
field. The heat energy dissipated by a person or any other warm blooded creature such as 
dogs, cats, etc., can be detected. 
Step 1 Go to System > Event > Smart Event. 
Step 2 Click PIR Alarm. 










