37
⑤
Picture Protection
Used to enable or disable the overwrite by new alarm images over previous ones if the
network camera/encoder’s built-in alarm image storage space gets full.
When the alarm image overwrite is disabled and the built-in memory is full, no more alarm
Download the alarm images to the PC
(page 45), and the built-in
memory has space and the recording of new alarm images restarts.
Recording alarm images in network camera/encoder’s built-in memory
Recording post-alarm images
With the alarm function enabled, the post-alarm images (images after alarms) are
automatically put in the network camera/encoder’s built-in memory.
Recording pre-alarm images
To record pre-alarm images (images before alarms) in the built-in memory, take the
following procedure. Set the pre-alarm time to 1 second or longer in the alarm settings.
Click on of “PREALARM” in the “
” menu on the monitor
screen.
To do this, get the system started with the administrator’s user name and
password. With the operator’s ones, “PREALARM” does not appear in the
“DELIVERY CONTROL” menu.
Now pre-alarm images can be recorded.
Recording time of pre-alarm images
The network camera/encoder’s built-in memory can record 380 alarm images with the “1/1”
resolution and the “A” picture quality. The recording time depends on the type of video
signal and the frame rate setting. Refer to the table below.
Frame rate (fps)
Recording
time (sec)
1 380
2 190
3 126
5 76
10 38
15 25
30 12
Frame rate (fps)
Recording
time (sec)
1 380
2 190
3 126
5 76
8 47
12 31
25 15
NTSC system
PAL system
