Why do you need to use a powered splitter instead of a simple Y-connector or T-connector when splitting analog video signals?
CCTV cameras have a source video impedance of 75 ohm. This video signal is transmitted over coax cable and should maintain the 75 ohm impedance. If a video source needs to be split into two or more cables, all of the video signals that are split need to also maintain the 75 ohm impedance level. To do this a powered BNC video splitter needs to be used. If a simple, non-powered Y or T connector is used, the impedance level will drop and there will likely be loss of video quality (ghosting and ringing effects ) and even complete video loss.
When do you need an splitter that is also an amplifier?
When using RG59 coax cable, there is generally no video loss up to distances of 750 feet. If you are planning on running cable longer distances than 750 feet, you should use a video amplifier.
This video demonstrates how to wire a 1 input to 2 output video splitter / amplifier. The concepts are the same for running cable to any of the splitters that we supply.