1 Scope and object
2 Normative references
3 Background
4 Overview of methods
5 Mapping functions
6 Reference test method
7 Apparatus
   7.1 Light source
   7.2 Modulation
   7.3 Launch optics
   7.4 Support and positioning apparatus
   7.5 Cladding mode stripper
   7.6 Deployment mandrel
        7.6.1 Cable cut-off wavelength, Method A
        7.6.2 Cable cut-off wavelength, Method B
        7.6.3 Fibre cut-off wavelength, Method C
        7.6.4 Jumper cable cut-off wavelength, Method D
   7.7 Detection optics
   7.8 Detector assembly and signal detection electronics
8 Sampling and specimens
   8.1 Specimen length
   8.2 Specimen end face
9 Procedure
   9.1 Position specimen in apparatus
        9.1.1 General requirements for all methods
        9.1.2 Deployment requirements for each method
   9.2 Measure output power
        9.2.1 Bend-reference technique
        9.2.2 Multimode-reference technique
10 Calculations
   10.1 Bend-reference technique
   10.2 Multimode-reference technique
   10.3 Curve-fitting technique for improved precision (optional)
        10.3.1 Step 1, define the upper-wavelength region
               10.3.1.1 Using the bend-reference technique
               10.3.1.2 Using the multimode-reference technique
        10.3.2 Step 2, characterize the attenuation curve
               10.3.2.1 Using the bend-reference technique
               10.3.2.2 Using the multimode-reference technique
        10.3.3 Step 3, determine the upper wavelength of the
               transition region
        10.3.4 Step 4, determine the lower wavelength of the
               transition region
        10.3.5 Step 5, characterize the transition region with
               the theoretical model
        10.3.6 Step 6, compute the cut-off wavelength,
               lambda[c]
11 Results
   11.1 Report the following information with each measurement:
   11.2 The following information shall be available upon request:
12 Specification information
Annex A (normative) - Requirements specific to method A - Cable
        cut-off wavelength, Lambda[cc], using uncabled fibre
      A.1 Specimen length
      A.2 Procedure - position specimen on deployment mandrel
Annex B (normative) - Requirements specific to method B - Cable
        cut-off wavelength, Lambda[cc], using cabled fibre
      B.1 Specimen length
      B.2 Procedure - position specimen on deployment mandrel
Annex C (normative) - Requirements specific to method C - Fibre
        cut-off wavelength, Lambda[c]
      C.1 Specimen length
      C.2 Procedure - position specimen on deployment mandrel
Annex D (normative) - Requirements specific to method D - Jumper
        cable cut-off wavelength, lambda[jc]
      D.1 Specimen length
      D.2 Procedure - position specimen on deployment mandrel