The monitoring cctv cables is a wire and cable used to connect the security surveillance camera and the actual terminal (computer or monitor, etc.), which is used to transmit the image data captured by the surveillance camera. Monitoring cctv cable is a coaxial cable, also known as coaxial video cable, the letter code is syv, so, also known as syv cable or video coaxial cable. Monitoring cctv cable application is very extensive, and our lives are closely related to our community, the work of the office, street and so on these places, can see the surveillance camera, of course, followed by a video line with the monitor. So, is to monitor the video line to provide us with a good security.
SYV cable 75Ω specifications include:
SYV-75-3、SYV-75-4、SYV-75-5、SYV-75-7、SYV-75-9、SYV-75-12，SYV-75-5 The most widely used，Classified as SYV-75-5-1，SYV-75-5-2，and SYV-75-3 Broken down into SYV-75-3-1、SYV-75-3-2.
SYV cable 50Ω about：SYV-50-2、SYV-50-3、SYV-50-5、SYV-50-7、SYV-50-9、SYV-50-12、SYV-50-15、SYV-50-17、SYV-75-15、SYV-75-17.
Monitor the video line from the inside out of the structure: single-core copper → insulation materials (pvc, etc.) → braid (copper weaving, aluminum weaving, etc.) → outer sheath (polyethylene, etc.)
Monitoring the video line must have a good shielding effect, the role of the weaving layer is here, the shield can be a good shield from the outside interference (magnetic field, etc.), to the core signal transmission to provide a good protection environment.
The coaxial cable of this structure, it has a high bandwidth and excellent noise suppression characteristics. The bandwidth of the coaxial cable depends on the cable length. 1km of cable can reach 1Gb / s ~ 2Gb / s data transfer rate. You can also use longer cables, but the transfer rate is to be reduced or the use of an intermediate amplifier. At present, coaxial cable is replaced by a large number of fiber, but still widely used in wired and wireless TV and some local area network.
Mainly used for transmission equipment and various digital program-controlled switches, optical transmission equipment, internal connections and patch panels between the signal transmission, for the transmission of data, audio, video and other communications equipment. The sheath is made of flame retardant material with high safety factor. The use of advanced technology to produce, so that the cable impedance uniformity.
How it works: The effective transmission line of the video monitoring line is actually only a single core copper line, so in the work of the project is the transmission of binary information.
General monitoring video cable is connected to the BNC connector, need to be welded at both ends with a good solder. And it is best not to use solder paste, residual cream clean up endless trouble. It is best to use good quality solder wire, solder wire rosin has a good role in welding and will not corrode the device. There are two welding methods:
1, the line stripped, the core into the BNC head of the welding hole (or screw tightening) the solder wire at the welding site, the tip of the solder wire on the solder wire to melt, move the tip of the solder penetration evenly. The same is true for shielded welding.
Points: the welding speed should be fast, before the rosin volatiles removed from the soldering iron to protect the solder joints without spikes.
2, the line stripped, the solder wire on the core with a soldering iron, the hanging tin wire inserted in the BNC head of the welding hole, with the iron again melt the core of the solder and make the BNC head welded together The
Points: wire hanging tin when the speed is fast, to avoid burning insulation layer, wire core hanging tin to be enough to ensure a solid welding.