This part of IEC 61280 provides uniform methods of measuring polarization mode dispersion (PMD) of single-mode installed links. An installed link is the optical path between transmitter and receiver, or a
portion of that optical path. These measurements may be used to assess the suitability of a given link for high bit rate applications or to provide insight on the relationships of various related transmission
attributes. This document focuses on the measurement methods and requirements for measuring long lengths of installed cabling that might also include other optical elements, such as splices, connectors,
amplifiers, chromatic dispersion compensating modules, DWDM components, multiplexers, wavelength selective switches, ROADMS etc.