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介绍一套“有源法”光时域反射计（ＯＴＤＲ）衰减特性检定装置。对参考量值采取自标定的方法，用一种串联替代法实现对高重复性衰减器３．０１０ｄＢ值的准确标定。该装置检定灵活性强，对ＯＴＤＲ衰减特性检定的不确定度优于０．０２ｄＢ／ｄＢ（９５％置信度）。
A set of “active method” optical time domain reflectometry (OTDR) attenuation characteristics of the test device. A self-calibration method for the reference values is used to accurately calibrate the 3.010 dB value of the high repetitive attenuator using a series of alternative methods. The device provides high verification flexibility with an accuracy of better than 0.02 dB / dB (95% confidence) in the OTDR attenuation signature verification.