Cables comprise the metaphorical cardiovascular network of a CCTV system, carrying power to the cameras and returning a video signal to the DVR or monitoring station. This crucial system component is often neglected, with many users giving little thought to the cable they choose. Not all cables are created equal, however, and a vast majority of image problems are caused by poor quality or improperly installed cables. In this article we will take a closer look at why proper cabling is so important to image quality and system reliability.
The typical cable of choice for a traditional CCTV surveillance system is RG59 Siamese cable. It is called "Siamese" because it is actually composed of two different cables attached to each other: a coaxial RG59 cable used to carry the video signal, and a two-wire cable (usually 18/2) used to carry the power.
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