User`s manual

4 Channel (Basic)
Network Video Recorder
User’s Manual
English
72
The“recordingbuffer”allowsusertodene“pre-alarm”and“post-
alarm” time for event recordings. The “pre-alarm” time sets the NVR
to record in advance when an event is triggered. The “post-alarm”
time sets the NVR to continue recording for a period of time after an
eventtriggerisnished.
Recording frame rate allows you to set different frame rate for dif-
ferent types of recording instead of recording at one frame rate only.
Use the drop-down menu and select one of the pre-dened frame
rates for a particular recording type
* The “Pre-alarm” function only
works when the “Continueous”
recording is also activated.
Users can also set to keep a previous number of days of recording
data by enabling the option below. This is quite often used in applica-
tion such as banking which certain countries requires to always keep
a minimum previous number of days of recording data.
* If this option is enabled, once the hard drive is full, the recycle function will
then start but it will ensure that the number of days of recording data dened
here will stay in hard drive instead of wiping out 20GB of data at a time.
* If the hard drive is not full, the NVR re-calculates twice a day (each at
2:30am and 2:30pm) to keep the dened number of days of recording data
from these two particular point of time backward.