User manual

Chapter 11. The [SETTING] Menu: Event
N300 Operations User Manual
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Adjust this trigger properly and you will be able not only to save your hard drive free space
but, moreover, to optimize your data operation in future (by viewing only the records where motion
was detected).
Pic. 11.27
When selecting this event type the following settings are available.
Set min time interval between triggers: when this time interval ends, the alarm event can
be restarted. The values from 1 to 999 seconds are available.
Detection Area: select a zone for detection.
To set motion detection go to SETTING – Event – Motion Detection (see paragraph 11.3).
Detection Type: specify the moment of alarm event triggering:
Start: an alarm triggers at the moment when the motion starts.
Stop: an alarm triggers at the moment when the motion ends.
Please Configure Motion Detection: a link which allows you to open motion detection
configuration window.
To get a clear idea of data recording process triggered by motion detection with the [Start]
detection type, please, look at the Picture 11.28:
Pic. 11.28
Let the [Pre-event Recording] time is 3 seconds and the [Post-event Recording] time is
6 seconds. Because of such values it is required to specify the “minimum time interval between
triggers” not less than 9 seconds (Pic. 11.27). If this interval is less and several events trigger one
by one, then some part of recorded information from the [Post-event Recording] interval will be
duplicated in the [Pre-event Recording] interval of the next file.
As an alarm event triggers the recording file is assembled from pre- and post-event
recording time periods. And the next event may trigger only after summarized period which
includes the post-event recording time interval of the current event and the pre-event recording
time interval of the next one (Pic. 11.29).