Monitoring LineIs a type of wire and cable used to connect security monitoring cameras and real terminals (such as computers or monitors), its function is to transmit the image data captured by the monitoring camera.Monitoring LineIs a type of coaxial cable, also known as coaxial video cable, with the letter code syv, so it is also called syv cable or video coaxial cable.Monitoring LineIt is widely used and closely related to our lives. We can see monitoring cameras in places like residential communities, office buildings, street corners, etc., and of course, behind them is connected.Monitoring LineSo, it isMonitoring Lineproviding us with good security assurance.

Monitoring LineStructure

Monitoring LineThe structure from the inside out is: single-core copper → insulating material (PVC, etc.) → braided layer (copper braid, aluminum braid, etc.) → outer sheath (polyethylene, etc.)

Monitoring video cables should have good shielding properties, and the role of the braided layer is to shield external interference (such as magnetic fields), providing a good protective environment for the signal transmission of the core.

This structure of coaxial cables gives it high bandwidth and good noise prevention characteristics. The bandwidth of coaxial cables depends on the length of the cable. A 1km cable can achieve a data transmission rate of 1Gb/s to 2Gb/s. Longer cables can also be used, but the transmission rate will decrease or require intermediate amplifiers. Coaxial cables have been largely replaced by fiber optics but are still widely used in wired and wireless television and certain local area networks.

Monitoring LineApplications

Mainly suitable for the transmission of equipment and various types of digital program-controlled switches, signal transmission between optical transmission equipment internal connections and wiring frames, used for transmitting data, audio, video, and other communication equipment. The sheath is made of flame-retardant materials, with a high safety factor. Advanced manufacturing processes are used to ensure good uniformity of the cable's impedance.

Working Principle: The effective transmission line of video monitoring cables actually consists of only a single-core copper wire, so the information transmitted during operation is binary.

Monitoring LineInstallation

Generally, monitoring video cables are connected with BNC connectors, and both ends need to be soldered. Do not use solder paste, as improper cleaning of residual paste can lead to endless troubles. Use high-quality solder wire, as the rosin in the solder wire has good soldering properties and will not corrode the components. There are two soldering methods:

1. Strip the wire, insert the core into the soldering hole of the BNC connector (or tighten with screws), place the solder wire at the soldering point, press the soldering iron tip on the solder wire to melt it, and move the soldering iron tip to allow the solder to penetrate evenly. The soldering of the shielding layer is done in the same way.

Key Point: The soldering speed should be fast, and the soldering iron tip should be removed before the rosin evaporates to keep the solder joint smooth and free of sharp points.

2. Strip the wire, place the solder wire on the core, melt it with the soldering iron, insert the tinned core into the soldering hole of the BNC connector, and use the soldering iron to melt the solder on the core again to fuse it with the BNC connector.

Key Point: The speed should be fast when tinning the core to avoid damaging the insulation layer, and there should be enough solder on the core to ensure a strong solder joint.