DIN EN 60793-1-49 : 2007

1 Scope
2 Normative references
3 Definitions
4 Apparatus
  4.1 Optical source
  4.2 Stability
  4.3 Launch system
  4.4 Detection system
  4.5 Computational equipment
5 Sampling and specimens
  5.1 Test sample
  5.2 Specimen endfaces
  5.3 Specimen length
  5.4 Specimen packaging
  5.5 Specimen positioning
6 Procedure
  6.1 Adjust and measure system response
  6.2 Adjust detection system
  6.3 Measure the test sample
7 Calculations and interpretation of results
  7.1 Differential Mode Delay (DMD)
  7.2 Length normalization
8 Documentation
  8.1 Report the following information for each test
  8.2 Information to be available upon request
9 Specification information
Annex A (informative) Comparison between this
        Standard and ITU recommendations
Annex B (normative) Source spectral width limitation
Annex C (informative) Discussion of measurement details
Bibliography

Specifies a method for characterizing the modal structure of a graded-index multimode fibre. This information is useful for assessing the bandwidth performance of a fibre especially when the fibre is intended to support a variety of launch conditions such as those produced by standardized laser transmitters.