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Common coaxial cable model specification and main parameters

Information Source:Henan Huadong Cable Co., Ltd Release date:2014-02-10

Coaxial cable can be divided into two basic types, baseband coaxial cable and broadband coaxial cable. At present, the baseband common cable, the shielding wire is made with copper mesh, characteristic impedance 50 (such as RG-8, RG-58 etc.); shielding layer of cable broadband coaxial cable used is usually aluminum punched, characteristic impedance 75 (such as RG-59).

Coarse and fine coaxial cable coaxial cable coaxial cable diameter is large or small. Thick cable suitable for local network is large, it is the long distance, high reliability. Due to the installation does not need to cut the cables, and therefore need to be flexible and adjust the position of computer network. But thick cable network must install the transceiver and transceiver cable, difficult installation, so that the total cost is high. In contrast, thin installation is relatively simple, low cost, but as the installation process to cut the cable, both ends shall be installed on the basic network connection (BNC), and then are connected with both ends of the T type connector, so when the joint much easy to generate bad contact potential, this is one of the most common fault in the operation of the ethernet.

In order to keep the electrical characteristics of coaxial cable, cable shielding layer should be grounded. At the same time the two have terminal to weaken the signal reflection.

Whether thick or thin is the bus topology, which is a cable connected with multi machine, this topology is suitable for the machine and dense environment. But when a contact failure, failure will affect all machine series the whole cable, diagnosis and repair faults are very troublesome, therefore, will gradually be unshielded twisted pair cable or replace.

Coaxial cable is the most commonly used are the following:

RG-8 or RG-11

The computer network is generally RG-8 thick Ethernet cable and RG-58 Ethernet thinnet. RG-59 used in the TV system. RG-62 for the ARCnet network and IBM3270 network.

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