American Dynamics Multivision Quest TMV910Q, Руководство пользователя

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Triplex Digital Video Multiplexer
Basic Operations 19
BASIC ALARM FEATURES
The multiplexer is equipped with an alarm processor to handle all alarm inputs and
outputs. The processor can be programmed to react to alarm events, and can be
activated by a timer or an external day/night switch. One of the principal uses of the
alarm function is to increase the level of recording detail of cameras which may
capture images of an event that caused an alarm.
Video Loss Alarm Event
If the video decoder can not detect the video signal from a camera channel that
normally has a camera present, a Video Loss alarm is triggered. The following actions
will occur:
1. The Alarm NC output will be open.
2. The
Alarm NO
output will be shorted to ground.
3. The internal buzzer will start beeping (if enabled).
4. The corresponding window on the Main Monitor will display the background
color, and the word “Loss”.
5. The camera will be encoded as “Video Loss” to the VCR output.
6. The events will be added to the alarm history log (if enabled).
The above actions will continue until the following conditions are met:
1. The video signal from the camera is restored.
2. The alarm duration time has elapsed.
Alarm In Alarm Event
The following responses will be activated (if enabled), when any one of the Alarm In
pins is active:
1. The Alarm NC output will be open.
2. The
Alarm NO
output will be shorted to ground.
3. The buzzer will start beeping (if enabled).
4. The corresponding window on the Main Monitor will show “ALARM” in the
OSD (on-screen display).
5. The camera with be encoded as “Alarm” to the VCR output.
6. The Main monitor will switch to the alarmed camera channel, and return to
previous state when alarm ends (if enabled).