Long distance transmission of high-definition video signals has always been one of the core requirements in fields such as security monitoring, broadcasting and television, and industrial control. As a key device connecting electrical and optical signals, video optical transceivers have become the core solution to solve the problem of long-distance video transmission due to their strong anti-interference ability, long transmission distance, and large bandwidth capacity.

Video optical transceiver is a device specifically designed for the optoelectronic conversion and transmission of video signals (as well as supporting audio and data signals). It usually consists of two parts: the "transmitter (Tx)" and the "receiver (Rx)", and needs to be used in conjunction with optical fibers (single-mode/multi-mode) to form a complete transmission link.

5 essential indicators to consider when making a purchase

When choosing a video optical transceiver, it is important to pay attention to the following parameters to avoid poor transmission performance due to parameter mismatch:

Video parameters: supported video resolutions (such as 1080P@60fps The 4K@30fps ）Video interface types (BNC, HDMI, SDI), compression standards (non compressed, H.264, H.265) If real-time monitoring is required (such as security), it is recommended to choose non compressed or low latency compressed (latency<100ms) models; ​

Transmission distance: Choose according to actual needs (such as 2km multimode, 20km single-mode, 80km single-mode), paying attention to reserving 10% -20% distance redundancy to avoid signal interruption caused by fiber loss; ​

Optical interface parameters: Optical module type (SFP, GBIC, it is recommended to choose a pluggable SFP module for easy replacement later), optical wavelength (multimode 850nm/1310nm, single-mode 1310nm/1550nm, 1550nm wavelength attenuation is smaller, suitable for ultra long distance), optical power (transmit optical power -10~-5dBm, receive sensitivity -30~-25dBm, the better the numerical value); ​

Number and type of interfaces: Confirm the number of video channels (1, 4, 8, etc.), whether audio/data interfaces (such as RS485 interfaces) are required, and whether Ethernet ports (such as 100Mbps network ports for IP device access) are needed; ​

Environmental adaptability: Industrial scenarios require attention to working temperature (such as -40 ℃~+70 ℃ wide temperature type), protection level (such as IP40 dust proof, IP67 waterproof, suitable for outdoor installation), and electromagnetic interference resistance (such as compliance with EMC Class B standards).