1. Why can not I communicate with camera even every configuration is correct?

• If using RS232 / TTL Port, please make sure Power GND Wire, Camera GND Wire & Host GND Wire are connected together;
• The cameras are broken, please kindly contact us for help.

2. Why the daytime picture has color cast?

• When using the 850 IR lens and 850 IR Board, the picture will be color cast caused by the IR lens;
• When using the 940 IR lens and 940 IR Board, the picture almost has no color cast.

3. Why Camera with 850 IR Board has a brighter image than the one with 940 IR Board?

• The 850 IR Board camera achieve the brighter than 940 IR Board.