Optical path problem of video optical transceiver

February 01, 2024

Video optical transceiver is a device that converts 1 to multiple analog video signals through various codes into optical signals for transmission through optical fiber media. Since the video signal is converted into optical signals, there are two technologies: analog conversion and digital conversion. Therefore, video optical transceivers are divided into analog optical transceivers and digital optical transceivers. The principle of the optical transceiver is to modulate the signal to the light, and transmit the video through the optical fiber.

The analog video signal is converted into optical signal through various codes for long-distance transmission through optical fiber medium. There are two conversion techniques for converting video signals into optical signals, namely analog conversion and digital conversion. Therefore, video optical transceivers are divided into analog optical transceivers and digital optical transceivers.

Optical path problem of video optical transceiver:

In security monitoring projects, most of the optical cables are laid by users themselves, generally G652 single-mode optical fibers. Since the coverage of the system is generally not large, the optical link loss of the standard equipment (≤20KM) is very rich. Therefore, the optical transceiver does not have excessive requirements on the optical path loss, but users often encounter no image, image jitter, and image quality. At this time, most of the problems are caused by the pigtails, jumpers or adapters at both ends of the optical path, and rarely are related to the backbone optical path. Common problems are: 1. The fiber optic connector is incorrectly inserted; 2. The fiber core (ceramic tube) of the fiber optic connector is contaminated. The solution is: 1. Reinsert the active connector or replace the fiber jumper; 2. Wipe the plug and socket core with 99.9% ethanol; 3. Check the camera video cable with a multimeter to determine whether there is a video signal.

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