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The number of alarm records depends on the “pre-alarm time” and “post-alarm time”
settings. This is calculated in the following equation.
Number of alarm records = Recording time ÷ (Pre-alarm time + Post-alarm time)
Let’s suppose that the frame rate of an NTSC system video signal is 5 fps and that the
pre-alarm time and post-alarm time are 1 and 2 seconds, respectively. The recording time
is 76 seconds.
Number of alarms = 76 ÷ (1 + 2) = 25
As a result, 25 alarm images can be recorded in the built-in memory.
Alarm images that are recorded in the network camera/encoder’s built-in memory can be
deleted by
Download the alarm images to the PC
If the network camera/encoder gets rebooted or the power is turned off and on, alarm
images are deleted from the built-in memory.
Setting the motion detection function
The motion detection function helps give out alarms if the camera detects something in
motion.
To use this function, it is necessary to enable both the
(page 36) and
motion detection function. Click on “motion detection” in the setting menu, and the motion
detection setting page shows up at the right side of the screen. The motion detection
settings will be reflected without clicking on . When the network camera/encoder is
rebooted, however, its settings will be back to previous ones. If the mask, minimum size or
other settings have been modified, be sure to click on to save the new settings.
Basic motion detection settings