A/322, “Physical Layer Protocol”Approved: 28 July 2025

This Standard describes the RF/Transmission of a physical layer waveform. This waveform enables flexible configurations of physical layer resources to target a variety of operating modes. The intent is to signal the applied technologies and allow for future technology adaptation.

Download current version: A/322:2025-07a, “Physical Layer Protocol”, 28 July 2025.

Previous Versions

There are multiple versions of this document. Please be sure to download the desired version. For amendments, the text includes a list of changes, the rationale for the changes, and compatibility considerations.

Download A/322:2017, “Physical Layer Protocol”, approved 6 June 2017. This is the version referenced by the U.S. FCC.

A/322:2017, dated 6 June 2017, was approved and adopted by reference into the FCC Rules 47 CFR § 73.682. The following document summarizes changes made to A/322 since the 2017 version. Download Approved Changes to A/322, “Physical Layer Protocol”, 13 September 2024.

Download A/322:2018, “Physical Layer Protocol”, approved 26 December 2018. This version of the Standard is normatively referenced in A/300:2019.

Download A/322:2020, “Physical Layer Protocol”, approved 23 January 2020. This version of the Standard is normatively referenced in A/300:2020.

Download A/322:2021, “Physical Layer Protocol”, approved 20 January 2021. This version of the Standard is normatively referenced in A/300:2021.

Download A/322:2022-03, “Physical Layer Protocol”, 31 March 2022. This version of the Standard is normatively referenced in A/300:2022-04.

Download A/322:2022-03, Amendment No. 1, “Time Expression”, approved 24 November 2022.

Download A/322:2022-11, “Physical Layer Protocol”, 24 November 2022.

Download A/322:2023-03, “Physical Layer Protocol”, 28 March 2023. This version of the Standard is normatively referenced in A/300:2023-03.

Download A/322:2024-04, “Physical Layer Protocol”, 3 April 2024. This version of the Standard is normatively referenced in A/300:2024-04.

Download A/322:2024-04 Amendment No. 1, “MIMO Extension”, approved 13 September 2024.

Download A/322:2024-09, “Physical Layer Protocol”, 13 September 2024.

Download A/322:2024-09a Amendment No. 1, “ATSC 3.0 Errata”, approved 28 July 2025.

Download A/322:2025-07, “Physical Layer Protocol”, 17 July 2025. This version of the Standard is normatively referenced in A/300:2025-07.