Provides uniform requirements for measuring the macrobending loss of single-mode fibres (category B) at 1550 nm or 1625 nm, category A1 multimode fibres at 850 nm or 1300 nm, and category A3 and A4 multimode fibres at 650 nm, 850 nm or 1300 nm, thereby assisting in the inspection of fibres and cables for commercial purposes.

IEC 60793-1-47:2009 establishes uniform requirements for measuring the macrobending loss of single-mode fibres (category B) at 1 550 nm or 1 625 nm, category A1 multimode fibres at 850 nm or 1 300 nm, and category A3 and A4 multimode fibres at 650 nm, 850 nm or 1 300 nm, thereby assisting in the inspection of fibres and cables for commercial purposes. The standard gives two methods for measuring macrobending sensitivity:
- Method A: Fibre winding, pertains to category B single-mode fibres and category A1 multimode fibres;
- Method B: Quarter circle bends, pertains to category A3 and A4 multimode fibres. For both of these methods, the optical power is measured using either the power monitoring or the cut-back technique. This third edition cancels and replaces the second edition published in 2006. It constitutes a technical revision. The main change is: Introduction of the Annex A describing small bend radius phenomena. Keywords: inspection of fibres and cables for commercial purposes

This publication is to be read in conjunction with IE C 60793-1-1:2008.