The situation of the digital optical transceiver is different. There are only two states of â€œlightâ€ and â€œno lightâ€ in the optical fiber, so the linearity requirement of the light source is not high or almost no requirement, thereby avoiding the loss of the signal during the processing. In addition, digital optical transceivers are relatively easy to implement mixed transmission of multiple channels and multiple signals. Since they are only converted to digital signals, the transmission of multiple channels of multiple signals can be easily achieved by means of TDM (Time Division Multiplexing) technology. Existing optical transceiver manufacturers can transmit 10 uncompressed real-time video images at a time on one wavelength channel.
The optical fiber network topology and optical fiber network topology determine the type of video optical transceiver. According to the optical fiber transmission network topology, in addition to the traditional point-to-point transmission optical transceiver, there are node-type and ring-type optical transceivers available for selection. Node-type video optical transceivers compose the front-end nodes into a chain network or a tree network. The node machine first receives the signals at each node, converts them into electrical signals, and then multiplexes and exchanges the signals with the local nodes. The WDM technology is used after the photoelectric conversion. Use a fiber optic transmission. No analog-to-digital conversion is performed at each node, reducing signal attenuation.
Ring-type optical transceivers connect all major nodes into a ring network, and can also have star branches through the type of optical branch, which can achieve the randomness of the network topology and achieve the sharing of information in the entire network. Multi-mode or single-mode fiber optic cable, fiber optic network is composed of multi-mode or single-mode fiber optic cable, which determines the choice of multi-mode or single mode. If the project is newly built, it is recommended to use the Opto-Optical network integrated services optical transceiver, single-mode optical fiber and single-mode optical transceiver. Compared to multi-mode optical fibers, single-mode optical fibers have longer transmission distances, larger information capacity, and faster speeds.
Optical port connection type, video optical fiber and optical fiber network connector can be divided into: FC, SC, ST, LC, D4, DIN, MU, MT and other types, according to the shape of the fiber end face divided into FC, PC (including SPC or UPC) And APC and other types. At present, only the FC, SC and ST are the most widely used. Most of the long-distance or large-capacity communications use FC or SC type connectors, which have the advantages of small insertion loss, easy installation, and high stability. Which is better with FC connectors, because it uses threaded fastening, can provide a stable and reliable connection. The SC connector is plug-in type, and the reliability of the connector after multiple plugging and unplugging is reduced. For short-distance signal transmission, more ST-type connectors are used, and many are used in multi-mode systems because the accuracy requirements are not high and the cost is low.
Users should pay attention to its video bandwidth and APL range when selecting digital video optical transceivers. The video bandwidth is wide enough, the video bandwidth is insufficient, the details of the monitor picture are not clear enough, the horizontal resolution is low, and even serious color distortion or loss occurs; APL, the average picture level, an average video brightness level is measured and represented The method for the percentage of the maximum white level. When APL is low, the image is dark, and when APL is high, the image is bright. At the same time, we must also pay attention to the video after-sales service manufacturers.
1. Use Surface Mount System to install electron component. High quality stable and more quality consistency.
2. Pass germany TUV testing, have EMC and LVD certificate.
3. The AC input power voltage is made between 85V to 240V. So it could select AC input voltage automatically. You could work in AC USA 110V or AC europe 220-240V.
4. CEL: Cellulose electrode is special electrode to lay big pipe on oil and chemical industry, natural gas, electric power, civil pipeline of oil, gas, water. They need high ilder voltage (more than 90V). This machine could do
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