IEC 63138-2 pdf – Multi-channel radio-frequency connectors – Part 2: Sectional specification for MQ4 series circular connectors 1 Scope This part of lEC 63138, which is a sectional specification(SS), provides information and rules for the preparation of detail specifications (DS) for MQ4 series circular connectors with fourRF channels, as well as a detailed specification of the blank format. An MQ4...