Alarm Tab; Figure 23: Alarm Tab - MATE iSense User Manual

5.3.3.

Alarm Tab

The Alarm tab may include a means to set the sensitivity for specific alarm
notifications. With some alarm types, the tab also displays additional setting
options (discussed under the relevant alarm type sections).
5.3.3.1. S
ENSITIVITY
The performance of video detection systems is usually measured by the
probability of detection for the desired event / behavior, and by the false alarm
rate. The default sensitivity is tuned to balance these two performance measures.
The sensitivity slider can be used in certain scenarios for better control of these
values. Starting with medium sensitivity (the default), you may select Low
sensitivity for further reduction in false alarm rate with somewhat reduced
probability of detection. Alternatively, you may increase sensitivity to High for
detecting small or low-contrast objects, at the expense of a slightly higher false
alarm rate.
5.3.3.2. A
CTIVATE
Activate Relay only appears as an option for alarms set for Trigger NG devices.
Activating this checkbox for the specified alarm will also activate the alarm relay
on the device. The alarm relay on the device can be physically connected to an
external alarm that will also sound when the alarm is triggered.
NOTE:
This feature is only functional if the Relay Handling policy has been activated for
the device through the Device Explorer application.
5.3.3.3. E
NABLE
Enable Relay Output for System Event only appears as an option for PC-based
VDUs (e.g., Behavior Watch). Activating this option for the specified alarm will
also activate the optional alarm relay connected to the USB port of the PC-based
VDU.
V4.5
F
IGURE
R
ELAY
R O
ELAY UTPUT FOR
Rules Manager/Device Explorer
23: A T
LARM AB
S E
YSTEM VENT
Page 5-19