7.1.5 VCBS
Kind of analog video signal, it is the composite baseband signal from the luminance and color
signals
7.1.6 BNC
A coaxial cable connector, the transmission of the composite video signal or an audio signal
lights commonly used for 75 - ohm connector .BNC head welding should pay special attention
to the welding strength and remove burrs or signal line contact with the shielding will cause
significant attenuation of signal strength.
7.2 Hard disk calculated and maintenance
7.2.1 Hard disk capacity is calculated with reference to
Initial setup of DVR, please make sure the hard drive is mounted in the machine.
The size of the hard disk itself.
Video recorder there is no limit for a single hard disk capacity, selected based on video saves
time. Choose the size of the total capacity.
Hard drive capacity is calculated as:
Total hard disk capacity (MB) = channel number X needs time (hours) X per hour, take up
hard disk space (MB / hour)
Note: the market to buy the hard drive capacity , 1GB = 1000MB , rather than theoretical 1GB
= 1024MB , therefore , [ hard ] - " [ the basic configuration ] , the capacity is less than the
actual hard drive nominal value .
Fixed bit rate encoding mode when the DVR hour generated the File Size valuation following
table.
The size of the
stream
( Maximum bit
rate )
96k
128K
160K
192K
224K
256
When the DVR using variable bit rate encoding mode, hour generated file size larger changes,
please refer to the actual size of the generated video files.
File Size
The size of
the stream
42M
320K
56M
384K
70M
448K
84M
512K
98M
640K
112M
768K
File Size
The size of
the stream
140M
896K
168M
1.00M
196M
1.25M
225M
1.50M
281M
1.75M
337M
2.00M
File Size
393M
450M
562M
675M
787M
900M