Becouse multimode fiber has high modal dispersion which limits to its bandwidth distance product, the band pass characteristics of the multimode fiber was analyzed.
多模光纤存在严重的模式色散，其带宽距离积受限。为此，分析了多模光纤的带通特性。
2
The process of establishing reference limits is illustrated by an example and issues on reference and decision limits, reference band, multivariate reference values are also briefly addressed.