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38 Chapter 2 Testing Video Displays
Testing analog component video SDTV (CE) CRTs
This section describes how to test CRT televisions with standard definition component
video inputs.
To test an analog component video SDTV display:
1. Use a VGA-to-RCA cable to connect the VGA connector on the generator with the
YPbPr inputs on the display under test.
Or, if your generator has optional component BNC connectors, use a BNC to RCA
cable to connect the BNCs on the generator with the RCA connectors on the display
under test.
2. Identify the component television formats to test. These formats are listed after the
composite television formats in the generator’s default Format knob list. Begin with the
first format in the range of standard definition component television formats (480i).
3. Determine additional formats to test based on the resolution of the television display.
The television specification sheet will provide information on what resolutions to test. It
is necessary to test only those resolutions with the supported scanning type (typically,
interlaced for a standard definition television).
4. Determine the images to test. For analog CRTs you typically want to select images to
test for geometry, focusing, photometry, resolution, cross talk, EMI, and regulation
characteristics. For more details on what images test these specific display attributes,
see “Selecting images” on page 28 or Appendix B, “Image Reference.”
Verify the test set-up:
1. Using the Format knob, select the first component video format (480i).
Alternatively, you can load the format with the following command:
FMTL 480i; FMTU
2. Using the Image knob, select a suitable image such as SMPTE133. Verify that the
generator is sending a valid signal to the display and that the display is presenting it.
Alternatively, you can load the image with the following command:
IMGL SMPTE133; IMGU
Test the display:
1. Using the Format knob, select the first test format.
2. Using the Image knob, select the first test image.
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 87 for details.