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Comparison of advantages of video optical transceiver and optical fiber transceiver
Video optical transceivers and optical fiber transceivers are not new to many people, but people often confuse the concepts of video optical transceivers and optical fiber transceivers, thinking that both are the same thing. Now let's talk about the difference between video optical transceiver and optical fiber transceiver.
1. The optical fiber transceiver is mainly used in the network, one end is connected to the optical fiber, and the other end is connected to the switch, mainly the network signal.
Optical transceivers can transmit video signals, 485 control signals, network signals, alarm signals, audio signals, switching values, etc. The optical transceiver on the monitor is generally: one end of the optical transmitter is connected to the camera, the other end is connected to the optical fiber, one end of the optical receiver is connected to the optical fiber, and the other end is connected to the display device
2. First talk about the optical transceiver, there are two conventional optical transceivers.
a. PDH optical transceiver is used to transmit data signals.
b. The video optical transceiver is used to transmit video monitoring signals. This optical transceiver needs to be divided (receiver and transmitter). That is, the main function of the video receiver is to convert the optical signal into an electrical signal (D / A). The main function of the transmitter, that is, the video transmitter, is to convert electrical signals into optical signals (A / D).
Fiber Transceiver
As mentioned earlier, the optical transceiver is used to transmit video signals. Then the optical fiber transceiver is used to transmit Ethernet signals. Although they are all photoelectric conversion, the protocols and principles of electrical signals are different, and the signals transmitted on the optical path are also different.
3. One end of the optical fiber transceiver is connected to the optical transmission system, and the other end (user end) comes out with a 10 / 100M Ethernet interface. Optical fiber transceivers are used to realize the conversion of photoelectric signals. The main principle of the optical fiber transceiver is that the optical fiber transceiver realized by photoelectric coupling usually has the following basic characteristics.
a. Provide ultra-low latency data transmission.
b. Completely transparent to network protocols.
c. Adopt special ASIC chip to realize data line speed forwarding. Programmable ASICs concentrate multiple functions on a single chip, which has the advantages of simple design, high reliability, and low power consumption. It can enable the device to obtain higher performance and lower cost.
d. The equipment mostly adopts 1 + 1 power supply design, supports ultra-wide power supply voltage, and realizes power supply protection and automatic switching.
e. Support ultra wide working temperature range.
f. Support complete transmission distance (0 ～ 120 kilometers)