882 Video Test Instrument User Guide (Rev A.35) 303
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: Unlike the uncompressed formats (linear PCM) the compressed audio test signals
are generated from a file. As a result the amplitude and frequency cannot be adjusted
through the audio test images.
To test compressed audio formats on an HDMI device from the 882:
1. Set up the 882 for HDMI output. See “Setting up the 882 for HDMI testing” on page 259.
2. Press the Source key and select the first test format (for example: 720p60).
Alternatively, to select the format using the command line interface, enter the following
commands:
FMTP /tffs0/Library/Formats // Set format path to 882 memory
FMTL 720p60 // Loads the 720p60 format
FMTU // Activates the 720p60 format
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