780C Multi-Interface Interoperability Tester – User Guide Page 117September 29, 2014 Revision A1Table 6-2: Audio AnalyzerAudio IEC Header decoded data (left side) DescriptionWord length Audio word length. One of: 16 bit 20 bit 24 bit6.4.4 Procedures for Testing Audio from an HDMI/HDBaseT Source DeviceUse the following procedures to test the audio from an HDMI source device.6. Make the physical connection between the 780C HDMI or HDBaseT IN port and the source device undertest using the configuration instructions above.7. Enable the HDMI or HDBaseT as the active digital interface input.8. Select Audio Analyzer from the Home menu shown below.