Earth wire, also known as lightning conductor, is used to lead the current into the earth wire; electrical leakage, the current into the earth through the earth wire. The symbol for earth wire is E (Earth) ; can be divided into power supply earth wire, circuit earth wire two. According to the curren

In some ways, it was not easy for many people to work hard for the majority of their lives to have a house with their own living environment. Therefore, many people would often invest considerable time, energy, and cost in renovations. Among them, network planning, all hope to do a little better, wh

How can the network module still have free play and non-free play? How Do I choose? Why is the free-to-play network module more popular than the cable module? Dare to ask small make-up is no doubt the general wiring of the small white! In the spirit of Inman's service, please send Lin Bai into the p

In fact, not only crystal head, this thing, any product has such drawbacks. Some people make products purely for the purpose of making money, and some people do products are holding a high quality of life to enjoy the high quality. Generally speaking! The price is expensive and the product is of goo

The BNC Connector is a type of Connector for coaxial cables. The full name is BayONet Nut Connector because of the widespread use of coaxial cables, bNC connectors are also widely used in communication systems. For example, the E1 interface in network devices is connected by coaxial cables with two

Coaxial line and optical fiber line are two kinds of transmission media widely used in modern communication field. They have their own unique advantages and characteristics.The transmission principleCoaxial line is a kind of transmission line covered by a conductor and a layer of insulating material

First you learn the difference between a splitter and an allocator, then you know which one to use.In CATV system, both the splitter and the splitter are used to distribute signals. The difference between a branch and a distributor is that no matter how many branches there are, there is one main out

A branch splitter is a passive device for power distribution of high frequency broadband signals. Its bandwidth has now reached 5-1000MHz, its simple structure, low price, work without power supply, widely used in the field of HFC cable TV. Devices are divided into indoor and field-type structure to

The general procedures for handling submarine cable incidents are as follows:1. The spread spectrum time domain reflectometer (SSTDR) is also used to locate the fault location. The instrument uses the principle of time-domain reflection. It transmits and receives a set of signals first, because a ca

Optical fiber optical communication can not be separated from the contribution of Chinese engineer Gao Kun, he first theorized in 1966 that glass fibers could be used in communications as a medium for light transmission, "The main cause of signal loss is the impurity of the material, not the glass i