光纤.第2-20部分:产品规范.A2类多模纤维的分规范

[中文适用范围]： IEC 60793 的这一部分适用于子类别 A2a、A2b 和 A2c。这些光纤用于或可以并入信息传输设备和光纤电缆（通常长达 2 公里）。这些纤维适用三种类型的要求： IEC 60793-2 中定义的一般要求；本标准涵盖的 A2 类多模纤维共有的具体要求，并在第 3 章中给出；适用于个别子类别或特定应用的特殊要求，这些要求在规范族规范附件中定义。 [外文原描述]： IEC 60793-2-20:2015 is applicable to sub-categories A2a, A2b, and A2c. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables (typically up to 2 km). Three types of requirements apply to these fibres: - general requirements as defined in IEC 60793-2; - specific requirements common to the category A2 multimodal fibres covered in this standard and which are given in Clause 3; - particular requirements applicable to individual sub-categories or specific applications, which are defined in the normative family specification annexes. This third edition cancels and replaces the second edition, published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - Nath has been replaced by NAff - specified test specimen length and measurement details for core diameter and NAff measurements. Keywords: information transmission equipment, optical fibre cables, category A2 multimodal fibres