Functions Recording/Playback Convenient 3 Chapter
Alarm Recording
You can set the recorder to start recording or change the recording mode when an alarm signal is input to the PARALLEL I/O connector at the rear panel.
For the alarm signals, you can specify a signal common to all cameras or signals for specific cameras.
The signal assignments are made from the Remote Control menu (page
Alarm recording modes
The recorder provides five modes of Alarm recording. For alarm recording, you may set the recording mode for alarm recording and a condition for canceling alarm recording.
The items to be set depend on the Alarm recording modes.
NORMAL mode
When an alarm signal is input during recording, the recording mode is changed.
You can set the recording mode for alarm recording and Cancel condition.
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Normal recording |
| Alarm | Normal recording |
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Cancel
If an alarm signal for a specific camera is input, recording with other cameras is stopped and only the picture from the camera in alarm status is recorded in the image quality mode and recording cycle of the recording mode specified for alarm recording.
INTERLEAVE mode
When an alarm signal is input, recording cycle is shortened.
As with Normal mode, you can set the recording mode for alarm recording and Cancel condition.
Alarm input
Alarm
Normal recordingNormal recording
recording
Cancel
When an alarm signal common to all cameras is input, this mode functions the same as Normal mode.
When an alarm signal for a specific camera is input, only the recording cycle for the camera in alarm status
is shortened. (Recording time will not change as the recording cycle for other cameras is prolonged.)
Example:
• Normal recording:
Records camera 1 → camera 2 → camera 3 → ...
camera n → camera 1, and so on.
•If an alarm signal for camera 1 is input: Records camera 1 → camera 2 → camera 1 → camera 3 → ... camera n → camera 1, and so on.
Note
Interleave mode is valid only when the recording cycle is more than “the number of cameras × 0.1 second” (NTSC model) or “the number of cameras × 0.12 seconds” (PAL model). If any shorter recording cycle has been specified, the recording cycle for the camera in alarm status will not be changed.
Example: To activate alarm recording in Interleave mode using ten cameras for recording, set the recording cycle to 1 second (NTSC model) or 1.2 seconds (PAL model) or longer.
EVENT mode
Recording starts when an alarm signal is input. You can set the recording mode for alarm recording and Cancel condition.
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No recording |
| Alarm |
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Cancel
When an alarm signal for a specific camera is input, only the picture from the camera in alarm status is recorded for alarm recording.
PREALARM mode
Recording starts tracing the specified time back. You can set the recording mode for alarm recording, Prealarm Time (time to reverse) and Cancel condition.
Alarm input
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No recording |
| Al | arm recordin | g | No recording | ||
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Cancel | ||
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As you can record the picture from the hard disk taken before the alarm was generated, it may be helpful in finding the cause of the trouble.
Chapter 3 Convenient Recording/Playback Functions |