Role of the transmission system

Role of the transmission system:

The information source converts the user information into a raw electrical signal, which is called the baseband signal. The electrical transmitter converts the baseband signal into a signal suitable for channel transmission, this conversion if modulation is required, its output signal is called the modulated signal, then this modulated signal is input into the optical transmitter to be converted into an optical signal, the optical carrier is transmitted to the receiving end through the fiber optic line, and then the optical signal is converted into an electrical signal by the optical receiver, the function of the electrical receiver is the reverse of the function of the electrical transmitter, which converts the received electrical signal into the baseband signals, and finally the user information is recovered by the information host.

Today, the use of fiber optic technology mainly includes two kinds, respectively, fiber optic active access technology and fiber optic passive access technology. From the perspective of optical fiber active access technology, in general, the media converter is fully applied, thus achieving the purpose of the bureau and the user connection, plays an important role, can provide users with high-speed broadband access. From the perspective of fiber optic passive access technology, its components are mainly PON technology.

Extended information:

Advantages of fiber-optic transmission systems:

①When using fiber optic transmission system for long distance transmission, compared with the traditional cable and wire, the clarity and fidelity of the picture is very outstanding.

②Fiber optic is an insulator, lightning and electromagnetic radiation and other electrical interference has no effect on it, at the same time, with the power line or high-voltage equipment in contact with the process will not appear corresponding problems.

3 in the process of fiber optic transmission, cross-bar interference, ground loops and image tearing and other problems do not exist, in this case, for the transmission of security provides an important guarantee, at the same time, when someone eavesdropping is very easy to find.

④Weather factors for fiber optic transmission is almost no impact, it is because of this, the fiber optic cable can be fully applied, able to set it up outside, but also able to lay it on the ground. At the same time, the possibility of optical fiber corrosion is very small, therefore, for the glass fiber of the optical cable, the relevant chemicals will not have a very serious impact on it.

⑤ For multi-mode and single-mode optical fiber, compared to coaxial cable, the quality of optical fiber is very light, at the same time, when the process of its application, there is no need for the corresponding application of magnifying glass, therefore, in the maintenance of the equipment, the operation is very simple, and in the long-distance transmission of information can be fully applied.