Main technical indexes of camera

Definition: Generally, horizontal definition is given, including 320, 420, 480, 570 lines, etc. The definition of color cameras is generally lower than that of black and white cameras.

Illuminance (sensitivity): It is an indicator of the light intensity that the camera can output normal image signals. The unit is lux. Generally, the minimum illumination of color cameras is 0. 1, and that of black-and-white cameras is 0.0 1.

Signal-to-noise ratio, S/N: It is the ratio of image signal to noise signal, expressed in decibels, generally greater than 46dB.

System: PAL and NTSC systems can be seen in China market, and PAL system is widely used.

Power supply mode: there are two modes: DC power supply and AC power supply. The DC power supply is 12V, and the AC power supply is divided into 24V and 220V.