IEC 61280-2-8:20 21作为IEC 61280-2-8:20 21 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。 IEC 61280-2-8:20 21规定了通过加速测量确定低误码率值的两种主要方法。这些包括可变决策阈值方法（条款5）和可变光学阈值方法（条款6）。此外，附录B中描述了第三种方法，即正弦干涉法。这第二版取消并取代了2003年出版的第一版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: -纠正5中公式（8）中的错误。5.2和5.5.3中的相关式； -更正条款、子条款、附图、程序和参考书目中的错误； -3.1中的术语和定义与IEC 61281-1中的术语和定义一致。

IEC 61280-2-8:2021 is available as IEC 61280-2-8:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61280-2-8:2021 specifies two main methods for the determination of low BER values by making accelerated measurements. These include the variable decision threshold method (Clause 5) and the variable optical threshold method (Clause 6). In addition, a third method, the sinusoidal interference method, is described in Annex B. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- correction of errors in Formula (8) in 5.5.2 and in a related formula in 5.5.3;
- correction of errors in the references to clauses, subclauses, figures, procedures, and in the Bibliography;
- alignment of the terms and definitions in 3.1 with those in IEC 61281-1.