1、 IEC 61280-4-1Edition 2.0 2009-06INTERNATIONAL STANDARD Fibre-optic communication subsystem test procedures Part 4-1:Installed cable plant Multimode attenuation measurement IEC 61280-4-1:2009(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY
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9、+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 61280-4-1Edition 2.0 2009-06INTERNATIONAL STANDARD Fibre-optic communication subsystem test procedures Part 4-1:Installed cable plant Multimode attenuation measuremen
10、t INTERNATIONAL ELECTROTECHNICAL COMMISSION XBICS 33.180.01 PRICE CODEISBN 2-8318-1045-4 Registered trademark of the International Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61280-4-1 IEC:2009(E)CONTE
11、NTS FOREWORD.5 1 Scope.7 2 Normative references.7 3 Terms,definitions,graphical symbols and acronyms.8 3.1 Terms and definitions.8 3.2 Graphical symbols.9 3.3 Acronyms.11 4 Measurement methods.11 4.1 General.11 4.2 Cabling configurations and applicable test methods.12 4.3 Overview of uncertainties.1
12、2 4.3.1 General.12 4.3.2 Test cords.13 4.3.3 Launch conditions at the connection to the cabling under test.13 4.3.4 Optical source.13 4.3.5 Output power reference.13 4.3.6 Received power reference.14 5 Apparatus.14 5.1 General.14 5.2 Light source.14 5.2.1 Stability.14 5.2.2 Spectral characteristics.
13、14 5.2.3 Launch cord.14 5.3 Receive or tail cord.15 5.4 Substitution/dummy cord.15 5.5 Power meter LSPM methods only.15 5.6 OTDR apparatus.15 5.7 Connector end-face cleaning and inspection equipment.16 5.8 Adapters.16 6 Procedures.16 6.1 General.16 6.2 Common procedures.17 6.2.1 Care of the test cor
14、ds.17 6.2.2 Make reference measurements(LSPM methods only).17 6.2.3 Inspect and clean the ends of the fibres in the cabling.17 6.2.4 Make the measurements.17 6.2.5 Make the calculations.17 6.3 Calibration.17 6.4 Safety.17 7 Calculations.17 8 Documentation.18 8.1 Information for each test.18 8.2 Info
15、rmation to be available.18 Annex A(normative)One-cord reference method.19 Annex B(normative)Three-cord reference method.21 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61280-4-1 IEC:2009(E)3 Annex C(normative)Two-cord reference meth
16、od.23 Annex D(normative)Optical time domain reflectometer.26 Annex E(normative)Requirements for the source characteristics for multimode measurement.32 Annex F(informative)Measurement uncertainty examples.35 Annex G(informative)OTDR configuration information.44 Annex H(informative)Test cord insertion loss verification.53 Bibliography.61 Figure 1a Socket and plug assembly.10 Figure 1b Connector set(plug,adapter,plug).10 Figure 1c Light source.10 Figure 1d Power meter.10 Figure 1 Connector symbols
