IEC 61300-2-40 pdf download.Fibre optic interconnecting devices and passive components – Basic test and measurement procedures 1 General 1 .1 Scope and object This part of IEC 61 300 describes the test for screening single-mode tuned connectors against tuning errors. It is applicable to single-mode angled connectors which are equipped with a tuning mechanism. The tests ensure that the plugs...