User Manual

Configuring Main System
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Figure 1-5
[Pre-Record Performance] The amount of physical memory of the computer that the system is
running on determines the pre-recording performance. Some options are grayed out if the computer
does not have enough memory for the selections.
This table shows the maximum pre-recording frame rate and the physical memory requirements of
each setup:
Good Better Best Extra
Maximum pre-recording frames per camera (fps) 15 fps 30 fps 60 fps 90 fps
RAM required 128 MB 256 MB 512 MB 768 MB
Note: The recording frame rate is based on a 320x240 recording size.
[Pre-Record Option (per camera)] Determines the number of pre-record frames.
 Total Frames: Specify the maximum pre-recording frames of the system.
 Frame/Sec Limitation: Specify the maximum pre-recording frame rate (fps) of a camera.
Dividing the Total Frames by Frames/Sec Limitation, you will get the pre-recording duration of each
camera. For example:
Total Frames 30
Pre-recording duration =
Frame/Sec Limitation
=
6
= 5 seconds
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