Securitytec DS-8004HCI-S User Manual page 92

option, otherwise you can select the ―Video‖ option to record video Only.
Note: If you change this option, the DVR must reboot before the changes take effect.

Resolution: Higher resolution provides a clearer image. The resolution options
from low to high are: QCIF, CIF, 2CIF, DCIF, 4CIF.
Note: Different DVR may support the different resolution level,some supports up to 4CIF
and some may only support up to CIF.Please find the real resolutions under this list box of
a particular DVR. If you change resolution options the DVR must reboot before the
changes take effect.

Bit Rate: You can select different bit rates to accommodate different settings of
resolution and frame-rate options include: (bps): 32K, 48K, 64K, 80K, 96K, 128K,
160K, 192K, 224K, 256K, 320K, 384K, 448K, 512K, 640K, 768K, 896K, 1M,
1.25M, 1.5M, 1.75M, 2M and ―User define‖.
The appropriate max bit rate selection is related to the resolution selected. If you
select a high resolution, you must select high bit rate. For CIF resolution, the
typical max bit rate is 384K~768Kbps for real time compression. For 2CIF/DCIF
resolution, the typical bit rate is 512K~1Mbps real time compression. For 4CIF
resolution, the typical bit rate is 1.25Mbps~1.75Mbps for real time compression.
Of course, you will select the proper bit rate based on the camera, background
and image quality requirement.

Frame Rate: Frame per second. Options are: Full (NTSC is 30 FPS and PAL is
25FPS), 20, 16, 12, 10, 8, 6, 4, 2, 1, 1/2, 1/4, 1/8, 1/16. For lower frame rates you
can select low bit rates to save bandwidth.
Note: Some series DVR may have lower frame rate for a particular resolution.

PreRecord Time: This sets the buffer size for retaining video/audio When you
enable motion detection recording or external alarm recording. You can define a
prerecord time. The options are: No Prerecord, 5 Seconds (default selection), 10
Seconds, 15 Seconds, 20 Seconds, 25 Seconds, 30 Seconds and Max Prerecord.
MaxPreRecord is to save all data in Prerecord buffer. The Prerecord time is
related to the bit rate (the lower the bit rate, the longer the Prerecord time).
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