Owner's manual

881/882 Video Test Generator User Guide (Rev A.22) 449
Testing DisplayPort sinks
This section provides procedures for testing DisplayPort sinks. The procedures below can
be performed using the front panel or the command line interface.
To test DisplayPort displays:
1. Set up the generator for DisplayPort output. See “Setting up the generator for
DisplayPort testing” on page 445.
2. Press the Source key and select the first test format.
Alternatively, you can load the format with the following command:
FMTL format_name
FMTU
3. Press the Content key and select the first test image. For digital fixed pixel displays,
you typically want to select images to test for pixel anomalies, photometry, luminance,
centering, resolution, and persistence. For more details on what images test these
specific display attributes, see “Image selection” on page 443 or Appendix B, “Image
Reference.”
Alternatively, you can load the image with the following command:
IMGL image_name
IMGU
4. Repeat steps 1 and 2 for all formats and test images.
Note: You can customize your generator to run through a specified set of formats and
images automatically or manually by creating test sequences. See “Creating a test
sequence” on page 226.
Use the following guidelines to verify proper operation:
• When testing photometry such as chrominance, use the ColorBar, SMPTE133, or
SMPTEbar images. Look for missing bars which may indicate a dead or
unconnected channel. Also, look at the transitions between the bars; they should
be sharp and distinct. Each bar also should be uniform in color and intensity across
its entire width.
• To test luminance, you can use the SMPTE133 (grayscale) images. To test gamma
correction, you can use the SMPTE133 (checkerbox) image. The detailed methods
for verifying these parameters on the SMPTE133 image are provided in Appendix
B, “Image Reference.”
• When testing for centering, use the Outline images. The detailed methods for
verifying centering with the Outline images (Outline0, Outline1, Outline2, Outline3)
are provided in Appendix B, “Image Reference.”
• When testing resolution with the Grill images, you should be able to see individual
and distinct stripes in all areas of the display at all four resolutions.