Serial Trigger and Analysis Module for Audio (I²S, LJ, RJ, TDM Audio bus) The Tektronix MDO3AUDIO is a Serial Trigger and Analysis Module (Application Module) and enables triggering on packet level information in I²S, LJ, RJ and TDM-audiobusses and provides analysis tools such as digital signal views, bus views, packet decoding, search tools and packet decode tables with timestamp information.