![]() Think of it this way: Analog cameras send the raw ingredients of a cake and the DVR bakes it. With NVRs, IP cameras prepare the video files before sending them to the NVR for. Some DVRs and analog cameras offer audio connections but don't have enough audio ports for every camera.Ī network video recorder (NVR) receives preprocessed video files from IP cameras over an Ethernet cable or wireless connection. With an analog security camera, there's no way to add audio to the video feed without running yet another cable. So cables 300 feet or more won't work as well. The longer the cables, the more the signal decreases. The analog signal's power drops with distance. ![]() While most analog cameras bundle these with a combined cable, you still need a separate power adapter because the DVR security system can't power the camera through the video cable. If you look closely at the back of an analog camera, you'll notice two connections: one for video and one for power. Power and video require separate cables.But instead of an optic nerve, those pulses travel through a coaxial cable to the DVR for conversion into a digital video file.Īnalog video is an old technology, but this makes it an affordable option for video surveillance that generally works well in multi-camera security systems. Like the human eye, light enters the camera, and it’s translated into electricity. It sounds fancy, but an analog video signal is just a series of electrical pulses representing light waves hitting your camera’s lens. A digital video recorder (DVR) connects to security cameras using an analog video cable.
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