Check all parts and components of the fiber optical box according to the assembly drawing. Using ways like inspection and operation verification methods to check the completeness of the installation of each functional device and the functionality it achieves.
The standard fiber jumper is connected by a dotted line, and the optical power is adjusted to 0 dB (using the 0 key). Then, the standard fiber jumper is connected according to the solid line in the figure, and the measured optical power value is the insertion loss value of the optical fiber insertion chip.
The value of the insertion loss of the optical splitter should be ≤ the nominal value of the optical splitter insertion loss + the nominal value of the optical fiber active connector insertion loss × 2.