162
Chapter 9
Testing HDMI Sink Devices
5. Press and release the
Step
key.
The
Step
key illuminates.
6. Using the
Image
knob, select the appropriate InfoFrame type.
The contents of the appropriate InfoFrame output appears on the HDMI display.
7. When finished, press and release the
Step
key.
The light on the
Step
key extinguishes.
Testing with Active Format Description (AFD)
When transporting HDMI video images from a source to a display, different formats may
be used between the content, transmission signal, and display. To provide compatibility
between the different formats, Active Format Description (AFD) is used.
AFD describes the portion of the coded video frame that is "of interest" (or “active”). The
appropriate AFD information is transmitted with the video to the HDMI display as part of
AVI InfoFrame packets. Using AFD information, the display is able to present the image
optimally.
For AFD testing, the generator allows you to apply different AFD cases using the AFDtest
image, which provides 12 different cases (as image versions) for both 4:3 and 16:9
displays. As each image version appears, the appropriate AFD information is sent with the
video to the display.
The following table lists the AFD cases (as specified in the
ETSI TR 101 154 v.1.4.1
standard) that are provided by the generator.
AFD case
Image
Version
(4:3 Format)
Image
Version
(16:9 Format) Aspect Ratio of Active Area
2
8
7
box 16:9 (top)
3
5
4
box 14:9 (top)
4
9-12
9-12
box > 16:9 (center)
8
0
6
Same as the signal format
9
1
1
4:3 (center)
10
7
8
16:9 (center)
11
4
3
14:9 (centered)
13
3
5
4:3 (with shoot and protect 14:9 center)
14
6
2
16:9 (with shoot and protect 14:9 center)
15
2
0
16:9 (with shoot and protect 4:3 center)
Summary of Contents for 802BT
Page 1: ...802BT 802R Video Test Generator User Guide ...
Page 52: ...42 Chapter 2 Testing Video Displays ...
Page 62: ...52 Chapter 3 Administrative Tasks ...
Page 118: ...108 Chapter 7 Using GPIB Interface ...
Page 194: ...184 Chapter 10 Testing EDID ...
Page 204: ...194 Chapter 11 Testing HDCP ...
Page 214: ...204 Appendix A Command Reference Commands by name ...
Page 595: ...Video Test Generator User Guide 585 ...
Page 611: ...Video Test Generator User Guide 601 ...
Page 612: ...602 Appendix A Command Reference ...
Page 716: ...706 Appendix B Image Reference ...
Page 744: ...734 Appendix C Error Messages ...