TECHNOLOGY NEWS

Twisted. At longer distances, you can use the popular "twisted". In addition to cable ¹ will need the additional equipment, ie the transmitter and receiver signals in twisted code M1670. Twisted pair consists of several couples who lived a wire with a diameter of 0.5 mm (as with a rope instead of a single wire is used on the 7 wires with a diameter of 0.2 mm and a total diameter of 0.6 mm). Strand of this type is often used by practitioners and CCTV ³ installations where a single cable, you can send a signal and the vision and power. It should be noted that the long decline in the supply voltage cable may prevent operation of the camera, so you must make calculations to determine the maximum distance between the power supply and camera. Different types of strands Types of twisted pair: UTP (unshielded), FTP (shielded by foiling), STP (the screen in the form of sheath and a protective outer sheath). In the near future is to be expected that the development of techniques for image compression, transmission (DSL) and the development of stranded Category 6 and 7 will make full use of this medium to good quality transmission. Fiber optic transmission due to the phenomenon of attenuation negligible, resistance to external electromagnetic fields, the lack of emission energy on the outside provides an excellent alternative for longer distances. However, the use of closed circuit television restricts the use of expensive additional converters to convert electrical signals to optical. Fiber optic cables also check well in digital broadcasts.