Hunt HQZ-1WKDA, Руководство пользователя

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When the camera view is covered, moved, hit by strong light, or out of focus,
the tampering detection will be triggered, and send snapshot to
mail/FTP/Samba/SD card, or trigger the external alarm. For example:
Before Tampering Detection Tampering Triggered (Defocused)
Before Tampering Detection Tampering Triggered (Lens Covered)
Before Tampering Detection Tampering Triggered (Glare)
Before Tampering Detection Tampering Triggered (Camera Moved)

Interval: The tampering detecting interval. Take the diagram below as
example. The interval is set for 30 second; the camera lens is covered
during 10 - 40 sec. At time point B, the camera compares the view with
time point A, and sends an alarm when it founds that the lens is covered.
At time point C, the camera compares the view with time point B, and
sends an alarm when it founds that the lens is uncovered.