BS EN 61280-4-1:2009

1 Scope
2 Normative references
3 Terms, definitions, graphical symbols and acronyms
4 Measurement methods
5 Apparatus
6 Procedures
7 Calculations
8 Documentation
Annex A (normative) - One-cord reference method
Annex B (normative) - Three-cord reference method
Annex C (normative) - Two-cord reference method
Annex D (normative) - Optical time domain reflectometer
Annex E (normative) - Requirements for the source
        characteristics for multimode measurement
Annex F (informative) - Measurement uncertainty examples
Annex G (informative) - OTDR configuration information
Annex H (informative) - Test cord insertion loss verification
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Pertains to the measurement of attenuation of installed fibre-optic cabling using multimode fibre, typically in lengths of up to 2000 m.

This part of IEC 61280-4 is applicable to the measurement of attenuation of installed fibreoptic cabling using multimode fibre, typically in lengths of up to 2 000 m. This cabling can include multimode fibres, connectors, adapters and splices.

Cabling design standards such as ISO/IEC 11801, ISO/IEC 24702 and ISO/IEC 24764 contain specifications for this type of cabling. ISO/IEC 14763-3, which supports these design standards, makes reference to the test methods of this standard.

In this standard, the fibre types that are addressed include category A1a (50/125 μm) and A1b (62,5/125 μm) multimode fibres, as specified in IEC 60793-2-10. The attenuation measurements of the other multimode categories can be made, using the approaches of this standard, but the source conditions for the other categories have not been defined.