Dahua NVR52-4KS2 Series User Manual page 349

Step 2 Select a channel and then click
Step 3 Click Setting next to Schedule to configure the alarm schedule.
Step 4 Configure alarm linkage. For details, see Table 5-50 .
Click Apply.
Step 5
5.10.5.4 Scene Change
When the detected scene has changed, system performs alarm linkage actions.
Procedure
Select Main Menu > ALARM > Video Detection > Scene Changing.
Step 1
Figure 5-210 Video tampering
to enable the function.
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