IEC 61753-053-02 Ed. 1.0 b:2022

This part of IEC 61753 contains the minimum initial test and measurement requirements and severities which non-connectorized single-mode fibre electrically controlled variable optical attenuator needs to satisfy in order to be categorised as meeting the requirements of category C
- Controlled environments, as defined in Annex A of IEC 61753-1:2018.