ALARMS OPERATIONS

There are three types of alarms; the alarms set by an external alarm trigger, the alarms set by a loss of the video signal and the alarms set by the video sensor.

EXTERNAL ALARMS

 

VIDEO LOSS ALARM

 

 

 

When external inputs such as a door bell, an interphone, etc., are connected to the CONTROL terminal (pins 1 – 8), they will send alarm triggers automatically. On the monitor screen, the alarm display will identify the camera corresponding to the alarm trigger.

Example: If an alarm trigger is received for camera 4 (in quad screen)

1 The buzzer is heard and the camera 4 indicator flashes.

The alarm output changes from HI (5V) to LOW (0V).

2 The image from camera 4 and the camera number (04) will be displayed, EA (External Alarm) will flash at the left of the camera number.

The action taken here will depend on the settings entered in the (ALARM SET) menu (see page 19).

EA 04

External alarm

 

 

 

 

 

 

 

Camera number

 

 

 

 

NOTE:

•When the alarm operation is over, the display will return to the mode preceding the alarm trigger.

•An alarm trigger can also be received at a terminal for which a camera is not connected to. In such a case, a grey screen will be displayed.

•The display mode (quad or full screen) selected for the alarm operation is set by the item “VIDEO OUT” in the (ALARM SET) menu.

Resetting the Alarm

•For an alarm in full screen display mode, press the corresponding camera select button twice.

•For an alarm in quad screen display mode, press the corresponding camera select button to switch to full screen display mode then press the corresponding camera select button one more time.

NOTE:

•The alarm display mode is selected according to the settings entered in the (DISPLAY SET) menu.

•During normal monitoring operations the camera select indicator lights according to the displayed camera. If there is an alarm trigger for another camera, the indicator will flash.

If there is an interruption of the video signal, the buzzer is heard, and the image just previous to the interruption is frozen on-screen or colour bars are displayed and “VIDEO LOSS” will flash on-screen.

The action taken will depend on the settings entered in the (VIDEO LOSS SET) menu (see page 25).

VIDEO LOSS

VIDEO LOSS

VIDEO LOSS

VIDEO LOSS

VIDEO LOSS

VIDEO LOSS

VIDEO LOSS

VIDEO LOSS

NOTE:

•If a video signal is not present from the beginning, then “NO VIDEO” will be displayed on a gray screen. This will not trigger a video loss alarm.

•The video loss alarm is recorded until the video signal is restored.

•In full screen display mode, video loss alarm is not possible.

Resetting the Alarm

•For an alarm in full screen display mode, press the corresponding camera select button.

•For an alarm in quad screen display mode, press the corresponding camera select button to switch to full screen display mode. Then, press the corresponding camera select button one more time.

NOTE:

•The alarm display mode is selected according to the settings entered in the (ALARM SET) menu.

•During normal monitoring operations the camera select indicator lights according to the displayed camera. If there is an alarm trigger for another camera, the indicator will flash.

•If the alarm is not reset, “VIDEO LOSS” will be displayed until normal live picture signals are restored.

VIDEO SENSOR ALARMS

The video sensor area is set in the (VIDEO SENSOR SET) menu. The brightness and contrast levels in the video sensor frame are used to trigger the alarm, and the alarm display (type of alarm and camera number) is shown on a live picture of the alarm trigger channel (see page 20).

SA 04

Video sensor alarm

 

 

 

 

 

 

 

Camera number

 

 

 

 

English

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