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Chapter 3 Convenient Recording/Playback Functions
3-4 Chapter 3 Convenient Recording/Playback Functions
When an alarm signal common to all cameras is input,
this mode functions the same as Normal mode.
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.
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.
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.
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 4-13).
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.
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 for a specific camera is input,
only the recording cycle of the camera in alarm status
is shortened.
When an alarm signal for a specific camera is input,
the recording cycle is shortened. (Recording time will
not change as the recording cycle for other cameras is
prolonged.) In this case, the settings (image quality
mode, etc.) other than the recording cycle are not
changed.
No recordingNo recording
Alarm input
Cancel
Pre-alarm time
(in minutes)
Alarm recording
Normal recordingNormal recording
Alarm input
Cancel
Alarm
recording
Normal recordingNormal recording
Alarm input
Cancel
Alarm
recording
No recordingNo recording
Alarm
recording
Alarm input
Cancel