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User’s Manual
DVR-4TH/8TH/16TH Series
SPECO TECHNOLOGIES 07/10
105
5.4.6.4 Data Lifetime By Channel
When data lifetime mode is set as <By Channel>, this item will be accessible.
Enter this menu and the user can setup data lifetime of each channel
independently. The value ranges from <1> to <365> days. Alternatively, select
<0> to disable this function.
5.4.7 Pre-Alarm Recording
This item is used to set the duration time of pre-alarm recording video. The
pre-alarm recording function aims to give the user the opportunity to view a
more complete event video. The user can see the video recorded after the
alarm is triggered, and the video recorded ahead the alarm.
When an event is triggered while normal recording is in effect, the unit will
start copying the pre-alarm and the post-alarm video to the event video. The
pre-alarm duration can be set from 0~30 seconds. The default setting is 15
seconds.
The quality of the pre-alarm video is the same as the quality setting for normal
record video; and the quality of the post-alarm video is the same as the
quality setting for event record video.
5.4.8 Circular Recording
The user can choose to record video in circular mode or in linear mode. If you
choose to record in circular mode, then the unit begins to overwrite the oldest
recorded video and stores new video over the HDD spaces. If you choose to
record in linear mode instead, the unit stops recording when the HDD is full.
From the Record Setup menu, move the cursor to <Circular Recording> and
press ENTER, then select <ON> / <OFF> using UP / DOWN keys.
5.4.9 Audio Recording
This item allows the user to enable / disable the Audio recording function of
the unit. When set to <ON>, audio input is recorded and saved with the video.
When set to <OFF>, audio is ignored. The default setting is <ON>.