scope:

This bulletin provides guidance on maintaining uniform audio program loudness between various combinations of analog sources, NTSC services, and digitally delivered terrestrial DTV, satellite and / or cable services while preserving the dynamic range delivery capability of the DTV service.

This bulletin addresses the source levels, gain structure and output levels of any consumer digital television broadcast receiver, set top box, integrated AV receiver or similar device that is capable of receiving any or all of the above services.