Quantum Data 881 - Testing 8-Channel HDMI Audio Output from Internal Source

298 Chapter 9 Testing HDMI Sink Devices
IVER 1 // Specifies the first image version
IMGU // Activates the image version
9. To test another HDMI audio output type, repeat the procedure.
Testing 8-channel HDMI audio output from internal source
To support testing of HDMI audio, the 882 provides 8-channel LPCM audio (using an
internally-generated sinewave) at the highest audio sampling rate (192 kHz). Multiple
scenarios are provided that allow you to test all audio channels at different amplitudes and
frequencies, as well as test using the different supported sampling rates. The sampling
rate for all channels is completed through a single image (AudioRAT).
High audio sampling rates and channel counts may require additional bandwidth in the
blanking intervals. The required additional blanking intervals may only be available with
high definition formats for example 720p and 1080i. When outputting 8 channels, the
audio sampling rate is only guaranteed to 96kHz and requires that you use a high
definition format.
Only two channels are guaranteed at the 192kHz sampling rate. These two channels must
be from the 882’s internal sine wave 882 as the SPDIF input is only guaranteed to 96kHz.
Note also that your receiving device must support 8-channel audio.
The following table lists the images used to perform HDMI audio testing using an internal
audio source for 8 channels.
Note: Selecting any of the numbered images (for example, Audio_1, Audio_2, etc.) causes
all other channels to be deactivated.
Image Description
Audio_1 Channel 1 output with adjustable amplitude.
Audio_1f Channel 1 output with adjustable frequency.
Audio_2 Channel 2 output with adjustable amplitude.
Audio_2f Channel 2 output with adjustable frequency.
Audio_3 Channel 3 output with adjustable amplitude.
Audio_3f Channel 3 output with adjustable frequency.
Audio_4 Channel 4 output with adjustable amplitude.
Audio_4f Channel 4 output with adjustable frequency.
Audio_5 Channel 5 output with adjustable amplitude.
Audio_5f Channel 5 output with adjustable frequency.
Audio_6 Channel 6 output with adjustable amplitude.
Audio_6f Channel 6 output with adjustable frequency.
Audio_7 Channel 7 output with adjustable amplitude.