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56 C2900M-B (1/03)
Table F. Alarm Settings (Continued)
Configuration Default Setting Description
Item
7. Use the Local sensitivity slide bar to set
detection sensitivity. You need to adapt sensitivity
to the respective environment and the acceptable
false alarm rate: for a lower false alarm rate
select a lower sensitivity and vice versa.
Experiment to find the best setting. Use of the
motion detection feature is recommended only
indoors and under controlled lighting conditions.
8. Use the Average n[frames] slide bar to define
for how long or over how many pictures motion in
the scene must be detected before an alarm will
be released. If the value is low, even movement
over a small period triggers an alarm. If the value
is high, movement over a longer period is
required to trigger an alarm.
9. Use the Object min size [nxn blocks] slide bar
to designate the minimum number of cells in the
frame a moving object must fill to trigger an
alarm. You can set the value between 1*1 and
6*6 (2*2 is recommended). If the size of the
object in the picture exceeds the value you set,
motion detection triggers an alarm.
10. The Alarm indicator box lets you set a
threshold so an alarm is triggered only if the
sensitivity of the video sensor is exceeded. Thus,
something such as background noise caused by
the camera can be filtered to avoid unwanted
alarms.
Pull up or down on the blue line to observe the
motion detector. Set it straight above the basic
deviation of the red curve.
11. Press Default to get the default settings for
motion detection.
The following conditions must be met for motion
detection to function:
• Motion detection must be activated.
• At least one cell must be activated.
• Sensitivity must be set higher than zero.
• The master alarm may also have to be activated.
(Continued on next page)