Quantum Data 881 - Manual (Page 362)

344 Chapter 10 Testing HDMI Sink Devices
Testing HDMI InfoFrames (882 only)
This section provides steps on how to test handling of auxiliary (InfoFrame) packets by an
HDMI display. The generator loads and sends default Auxiliary Video Information (XAVI),
Audio (XAUD), and Source Product Description (XSPD) InfoFrame packet buffers to the
display for each format (see table on page 299 for a list of HDMI formats). The XAVI and
the XAUD InfoFrame packets are sent at every frame (repeated mode), while the XSPD is
sent only once. The XMPG and XGIF InfoFrames are gated off and not enabled.
Note: This feature is not supported on the 881 generator.
HDMI provides various types of auxiliary data in the form of InfoFrames. InfoFrames allow
the HDMI source to keep an HDMI display informed as to “what is coming down the pipe”
so that it can present the content optimally—without any viewer intervention.
There are five different types of InfoFrames:
• auxiliary video information (AVI)
• audio (AUD)
• source product description (SPD)
• MPEG information (MPG)
• generic (vendor-specific) information (GIF)
Each type carries information regarding a different aspect of the HDMI audio/video
transmission.
The procedures below can be performed using the front panel or the command line
interface.
Viewing InfoFrame contents (882 only)
The generator provides a convenient method for monitoring the InfoFrame content of the
transmitted HDMI signal. The procedure below describes how to view current InfoFrame
contents.
Note: This feature is not supported on the 881 generator.
To view current HDMI InfoFrame contents transmitted from the generator:
1. Set up the generator for HDMI output. See “ Setting up the generator for HDMI testing ”
on page 302.
2. Press the Source key and choose a format suitable for the HDMI display (for example,
DMT0660). Refer to the table in “ Format selection ” on page 298.
Alternatively, to select the format using the command line interface, enter the following
commands: