Fiber patch cords are used to make jumpers from the device to the fiber optic cabling link and are often used between optical transceivers and terminal boxes. Network communication requires the safe and unimpeded operation of all devices, as long as the intermediate device failure at one point will cause signal interruption. Before use, it is very careful to check. The plug-in loss detector is first used to measure whether the jumper is clear or not, and the index is measured. The general carrier grade index: the insertion loss is less than 0.3dB, and the return loss is greater than 45dB.
Fiber patch cord detection is to ensure the quality of the system connection, reduce the fault factor, and find the fault point of the fiber in the event of a fault. The main testing methods are manual and simple instrument testing.
The manual simple detection method is to achieve visible light from one end of the fiber jumper and which one to see from the other end. This method is simple but not quantitative.
Precision instrument measurement: The required tools are optical power meter or optical time domain reflectometer, which can measure the attenuation of the fiber jumper and the attenuation of the connector, and even detect the breakpoint position of the fiber jumper. This measurement can quantitatively analyze the cause of the failure. When testing the fiber jumper, there will be a numerical instability. If the test is only a fiber jumper, then the connector is not good enough; if the fiber is connected to the jumper, it may be a problem. If the insertion loss value is not very good during the fiber test, it is easy to drop the data packet when transferring data in actual use.