IEC 62604-1:2022 is available as IEC 62604-1:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62604-1:2022 specifies the methods of test and general requirements for SAW and BAW duplexers of assessed quality using either capability approval or qualification approval procedures. This edition includes the following significant technical changes with respect to the previous edition:
- the term "multiplexer" has been added to Clause 3.
NOTE In this document, SAW and BAW duplexers are treated simultaneously because both duplexers are used in the same manner especially in mobile phones and have the same requirements of characteristics, test method and so on.