EN 60793-1-46:2002

INTRODUCTION
1 Scope
2 Normative references
3 Reference test method
4 Apparatus
5 Sampling and specimens
   5.1 Specimen length
   5.2 Specimen end face
   5.3 Specimen preparation
   5.4 Reference specimen
6 Procedure
7 Calculations
8 Results
   8.1 Information to be provided with each measurement
   8.2 Information available upon request
9 Specification information
Annex A (normative) Requirements specific to method A -
        Change in transmittance by transmitted power
Annex B (normative) Requirements specific to method B -
        Change in transmittance by backscattering
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Figures

Gives two methods for monitoring the changes in optical transmittance of optical fibres and cables that occur during mechanical and environmental testing. It provides a monitor in the change of optical transmission characteristics arising from optical discontinuity, physical defects and modifications of the attenuation slope. The methods are the change in transmittance by transmitted power, and by backscattering. They apply to both multimode and single-mode fibres.