It is often difficult to figure out what to do when it comes to monitoring optical backhaul problems: any link such as the camera, jumpers, optical transceiver, and power supply may be related. This article provides a three-step troubleshooting sequence based on symptoms to avoid replacing the entire device at the first step.

Measure the optical power first and then determine the link

When the optical power at the receiving end is significantly lower than other links in the same project, it is probably due to excessive fiber link loss. Check in turn whether the jumper is bent, whether the flange connector is dirty, and whether the loss at the welding point is high. If necessary, use an optical power meter to measure and position it segment by segment. In engineering, it is recommended to reserve about 3dB margin in the link budget. There will still be buffer space after the line ages, so that the collective criticality will not be reached just after the warranty period.

Screen abnormalities mostly occur on the interface side

Problems such as color cast and color distortion mostly occur in video cables and BNC connectors, not in the optical path. First, use a short wire to directly connect the camera and monitor to verify, and reduce the fault to outside the optical transceiver link. If a single channel is abnormal, check the interface and camera. If all are disconnected, focus on checking the optical path and power supply.

Troubleshooting ideas for occasional network disconnections

For project-level faults, please refer to the Public Security Bureau of a certain city.Phase III of "Safe City" video surveillance optical fiber transmission of a city's Public Security BureauAccording to the implementation experience, the power supply is first, then the optical path, then the channel is changed, and the scope is reduced layer by layer. EB-LINK technical support can assist in interpreting on-site data during working days. Tel: 0755-83179002.