IEC 60793-1-46:2024建立了监测衰减变化的统一要求，从而有助于检查商业用途的光纤和电缆。本文件给出了两种方法，用于监测在机械或环境测试或两者期间发生的光纤和电缆的衰减变化。它提供了由光学不连续性、物理缺陷和衰减斜率修改引起的衰减特性变化的监视器: -方法A:衰减随发射功率的变化； -方法B:通过反向散射改变衰减。 方法A和B适用于以下所有类别纤维的监测: -A类:多模光纤； -B类:单模光纤； -C类:单模内连接光纤。 两种测量的共同信息包含在第1条至第10条中，与每种方法相关的信息分别出现在附录A和附录B中。

IEC 60793-1-46:2024 establishes uniform requirements for the monitoring of changes in attenuation, thereby assisting in the inspection of fibres and cables for commercial purposes. This document gives two methods for monitoring the changes in attenuation of optical fibres and cables that occur during mechanical or environmental testing, or both. It provides a monitor in the change of attenuation characteristics arising from optical discontinuity, physical defects and modifications of the attenuation slope:
- method A: change in attenuation by transmitted power;
- method B: change in attenuation by backscattering.
Methods A and B apply to the monitoring of all categories of the following fibres:
- class A: multimode fibres;
- class B: single-mode fibres;
- class C: single-mode intraconnection fibres.
Information common to both measurements is contained in Clause 1 to Clause 10, and information pertaining to each individual method appears in Annex A, and Annex B respectively.