Speco 4TL - Alarm in; Alarm out; Block Threshold; Sensitivity

TL H.264 DVR User’s Manual
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Sensitivity
This item is used to set the sensitivity of detection grids for the camera. A
greater value indicates more sensitive motion detection. A motion alarm will
be triggered once the amount of motion detected exceeds the Threshold
value.
Move the cursor to <Sensitivity> and press ENTER, and then use UP/ DOWN
keys to adjust the value. The value is increased by 4% increment.
Block Threshold
<Block Threshold> indicates the motion alarm triggered level; select from <1>
to <16>. Selecting <1> means the DVR will trigger the alarm when one grid is
detected; and selecting <16> means the DVR will trigger the alarm when 16
grids are detected. Move the cursor to <Block Threshold> and press ENTER,
and then use UP / DOWN keys to adjust the value.
5.6.8.6 Alarm In
This item allows users to enable/ disable alarm input detection. According to
users’ application, select <N/O> (Normal Open) or <N/C> (Normal Close) to
enable the alarm input detection, or select <OFF> to disable the detection.
If <N/C> is selected without installing any device, an alarm will be triggered
and the Event Icon will always display on the monitor until the selection is
changed to <N/O> or <OFF>, or when a device is installed.
5.6.8.7 Alarm Out
This item allows users to enable/ disable the alarm output on the selected
channel to activate the relay. The signal can be a light or siren to caution an
alarm event. Select <ON> to enable the alarm output, or <OFF> to disable.