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Multiplexer cascade optical-fibre terminal system

An optical transceiver and cascading technology, applied in the field of data transmission systems, can solve problems such as poor system maintainability, signal attenuation, and inability to realize long-distance transmission.

Inactive Publication Date: 2007-07-18
HONGDI IND SHENZHEN CITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Unable to form a network, and the system maintainability is poor;
[0008] 2. Unable to achieve long-distance transmission
The cascading of multi-stage optical transceivers will cause a sharp attenuation of the signal

Method used

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  • Multiplexer cascade optical-fibre terminal system
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  • Multiplexer cascade optical-fibre terminal system

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] The video surveillance system is one of the important components of ITS (Intelligent Transportation Transmission System). For example, in the video surveillance system used in the highway ITS project, the requirements for video signal transmission have the following characteristics:

[0017] 1. Large capacity: There are usually dozens or even hundreds of video signals in a monitoring sub-center;

[0018] 2. High image quality requirements: the image requirement reaches 480 lines, and the weighted signal-to-noise ratio (S / N) requirement is not less than 57dB; field / second);

[0019] 3. Multi-level control is required: At present, the monitoring and management of video signals in expressway projects can be divided into four levels of monitoring systems: station level, road section center, district center, and provincial center from bottom to top.

[0020] (1) St...

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Abstract

This invention relates to a multiple cascade light terminal system including a data node and a data terminal, in which, video signals are input via the data node and output from the data terminal, after the video signal is input, it passes through a video amplifying module, A / D conversion module of said node to enter into a multiplex module then to a laser T-R module after serial-parallel conversion to be transmitted to a laser T-R module of the data terminal by fiber then to a multiplex module after serial-parallel conversion then to be output to a monitor after A / D conversion and video amplification.

Description

【Technical field】 [0001] The invention relates to a data transmission system, in particular to a multi-channel cascaded optical transceiver system. 【Background technique】 [0002] Node-type optical transceiver is a new type of optical fiber transmission system, usually using 1-core optical fiber to connect each node to form a chain network structure, video and data can be attached to any node. At the same time, signals such as audio, two-way data, and Ethernet data can also be transmitted in the network. [0003] Please refer to Figure 1, which is a schematic diagram of a node-type optical transceiver network. Node-type optical transceivers are divided into analog transmission mode and digital transmission mode according to different signal modulation methods; according to cascade mode, they can be divided into electrical cascade transmission mode and optical cascade transmission mode. Its advantages are: [0004] 1. Simple and flexible to use, high video quality, high da...

Claims

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Application Information

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IPC IPC(8): H04B10/12H04B10/14H04B10/20H04N7/10H04B10/40
Inventor 吴洪进
Owner HONGDI IND SHENZHEN CITY
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