1、 IEC/TR 62627-04 Edition 1.0 2012-07 TECHNICAL REPORT Fibre optic interconnecting devices and passive components Part 04:Example of uncertainty calculation:Measurement of the attenuation of an optical connector IEC/TR 62627-04:2012(E)Copyrighted material licensed to BR Demo by Thomson Reuters(Scient
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12、 reproduction or distribution is permitted.Uncontrolled when printed.2 TR 62627-04 IEC:2012(E)CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references.6 3 Measurement of attenuation.6 3.1 General.6 3.2 Attenuation measurement for optical connectors.7 3.3 Insertion loss measurement using a
13、 reference connector.8 4 Uncertainty estimation.8 4.1 General.8 4.2 Uncertainty calculation.9 4.3 Evaluation of uncertainty.9 4.4 Combined and expanded uncertainty.12 Annex A(informative)Uncertainty of measurements.14 Annex B(informative)The uncertainty budget for attenuation measurements.17 Bibliog
14、raphy.21 Figure 1 Schematic representation of an attenuation measurement.7 Figure 2 Measurement of Pin.7 Figure 3 Measurement of Pout.8 Table 1 Evaluation of the uncertainty contribution due to the power meter for the measurement of the attenuation of an optical connection.10 Table 2 Evaluation of u
15、ncertainty contribution due to the light source for the measurement of the attenuation of an optical connection.11 Table 3 Evaluation of uncertainty contribution due to the device under test for the measurement of the attenuation of an optical connector against reference connector(uref included).11
16、Table 4 Evaluation of uncertainty contribution due to the device under test for the measurement of the attenuation of an optical connection(uref excluded).12 Table 5 Evaluation of uncertainty contribution for the measurement of the attenuation of an optical connector against reference connector(uref included in uDUT).12 Table 6 Evaluation of uncertainty contribution for the measurement of the attenuation of an optical connection(uref excluded in uDUT).13 Table 7 Expanded combined uncertainty.
