DIN EN 60793-1-40 : 2004

INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Calibration requirements
5 Reference test method
6 Apparatus
7 Sampling and specimens
   7.1 Specimen length
   7.2 Specimen end face
8 Procedure
9 Calculations
   9.1 Methods A and B
   9.2 Method C
   9.3 Method D
10 Results
   10.1 Information available with each measurement
   10.2 Information available upon request
11 Specification information
Annex A (normative) Requirements specific to method A - Cut-back
Annex B (normative) Requirements specific to method B - Insertion
        loss
Annex C (normative) Requirements specific to method C - Backscattering
Annex D (normative) Requirements specific to method D - Spectral
        attenuation modelling
Annex ZA (normative) Normative references to international publications
         with their corresponding European publication

Specifies uniform requirements for measuring the attenuation of optical fibres. Four methods are described for measuring attenuation: (a) cut-back, (b) insertion loss, (c) backscattering and (d) modelling spectral attenuation.