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Role of Twisted Pair Cable in CCTV

by:Fugen      2020-06-20
Twisted pair - 4 pairs of 'twists' Twisted is another involving CCTV cable Twisted pair cable can be a good alternative to coaxial cable if the time of the run is more than a few hundred meters. With twisted pair, runs as much as 600 meters can use without any in-line repeaters. Twisted pair transmission one other called balanced video indicator. The cable consists of 4 pairs of 'twists'. Because each set of wire are twisted for the length from the cable, any electro-magnetic interference affects both wires in the same way. Both wires are in contact with the same interference, which usually why everyone called balanced transmission. Unlike coaxial cable, where the shield is grounded and commons the zero potential between the two points, issues of tarp pair video transmission concept does not common the zero potential between the two points. If 2 wires have similar characteristics, and enough twists per meter(the more the far better!), they will be confronted with the same levels of interference and voltage slip. This allows for most unwanted noise to be eliminated in the receiving side. Video balun - converts twisted pair to coax In CCTV cameras usually have a BNC connection with the camera. You cannot directly connect twisted pair cable to this. Whats needed is really a video balun on each sending and receiving give up. You still connect a coax cable to the camera, the coax cable then relationships a video balun, which transmits the signal over twisted pairing. On the receiving end, another video balun is critical to convert the signal to run through a coaxial cable. Because twisted pair cables generally have 4 pairs per send. This actually allows a person to carry 4 video signals in one cable. Anyone can check out 4 cameras at one location together with run of one cable Fiber optics - CCTV Cable Fiber optics uses light as a carrier Fiber optic transmission offers best quality and may be the most secure transmission multi-media. Fiber optics have been used in long distance and overseas communications for decades. It has mainly been unused in CCTV cameras for fear of the usb ports being a 'touchy' technology and 'too expensive'. Fiber optics significantly cheaper and much easier to install, so it's use increases in upcoming. Fiber optic transmission uses light to transmit data, associated with electric gusts. The advantages of fiber are: intercepting the signal, which could be easily detected Fiber optics do have some disadvantages suffice to say. Terminating fiber optic cables requires special tools and precision of workmanship as compared to any other cable. Also switching and routing of fiber optic signals isn't easy. Fiber optic cables are also more fragile, stepping regarding the cables could easily damage them.
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