IEC 61300-3-14:20 14(E)提供了一种测量可变光衰减器(VOA)的衰减值设置的误差和可重复性的方法。VOA有两种控制技术，手动控制和电气控制。该标准涵盖了VOA的控制技术，也涵盖了单模和多模光纤VOA。本第三版取消并取代2006年出版的第二版，构成技术修订。与上一版相比，此版本包括以下重大技术变更: -标题修改，将“准确性”一词改为“错误”； -在范围内包括手动和电控可变光衰减器的区别； -修订有关设备和细节的条款，以与IEC 61300系列中的其他标准协调一致；-在用于计算的条款中增加了“衰减与设定值的最大偏差”； -在附录B中增加“迟滞特性的测量方法”。 关键词:衰减值设置可变光衰减器（VOA）

IEC 61300-3-14:2014(E) provides a method to measure the error and repeatability of the attenuation value settings of a variable optical attenuator (VOA). There are two control technologies for VOAs, manually controlled and electrically controlled. This standard covers both control technologies of VOAs and also covers both single-mode and multimode fibre VOAs. This third edition cancels and replaces the second edition published in 2006 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- title modification replacing the word "accuracy" by "error";
- inclusion of the distinction of manually and electrically controlled variable optical attenuators in the Scope;
- revision of clauses for apparatus and details to be specified to harmonize with other standards in the IEC 61300 series;
- addition of "the maximum deviation of attenuation from setting" to the clause for calculation;
- addition of "measurement method of hysteresis characteristics" in Annex B. Keywords: attenuation value settings, variable optical attenuator (VOA)