HIKVISION DS-2CC5197P-DG1 User Manual page 18

Day/Night High-definition Box Camera· User Manual
S/N ratio: The ratio of Signal voltage and Noise voltage. The ratio
is larger, the effect of noises is less, and the image is clearer.
OSD (On-Screen Display): The on-screen display is a text
superimposed on the live view screen to display information and
menu.
Synchronous System: Synchronization of the camera usually
contains power synchronization and internal synchronization.
Internal synchronization is realized by the synchronous signal
which is generated by the inside crystal oscillator.
White Balance: White balance is the white rendition function of
the camera used to adjust the color temperature according to the
environment automatically.
BLC (Backlight Compensation): If the camera focuses on an
object against strong backlight, the object will be blurred on the
live view screen. The BLC function can compensate light to the
object in the front to make it clear, but this causes the
over-exposure of the background where the light is strong.
Figure 1-2 BLC On and BLC Off
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