Video cable SYV75-5-1 (128P)

Coaxial cable from the inside to the outside is divided into four layers: the central copper (single-stranded or solid wire stranded wire), plastic insulator, a conductive layer and wire mesh sheath. Central copper wire and mesh-shaped conductive layer to form a current loop. Since the center of copper wire and mesh-shaped conductive layer coaxial relationship named. Coaxial cable instead of conducting alternating current, ie the current direction several times per second will be reversed. If you use general wire transmission of high frequency current, this wire will act as an outside radio transmitter antenna, this effect the loss of the power of the signal so that the received signal strength decreases. Coaxial cable is designed precisely to solve this problem. Center wire emitted radio is isolated conductive layer mesh, mesh-shaped conductive layer can be controlled by way of grounding emitted radio. Coaxial cable is also a problem, that is, if a section of the cable occurred relatively large extrusion or distorted, so from the center of the wire and the mesh between the conductive layer is not consistent, which can cause internal radio waves will be reflected back to the sender. This effect can reduce the signal power received. To overcome this problem, it is added between the central wire and mesh-shaped conductive layer of plastic insulation to ensure a consistent distance between them. This also contributed to this relatively stiff and not easy to bend the cable characteristics.