Quantum-data 881 Manual do Utilizador descarregar pdf (Página 74)

56 Chapter 2 Testing Video Displays

4. Choose a suitable image (for example, SMPTE133) by pressing the adjacent soft key.

Alternatively, you can load the image with the following command:

IMGL SMPTE133

IMGU

5. Verify that the image appears on the display under test.

To test the display:

1. Press the Source key and select the first test format.

Alternatively, you can load the format with the following command:

FMTL format_name

FMTU

2. Press the Content key and select the first test image.

Alternatively, you can load the image with the following command:

IMGL image_name

IMGU

3. Repeat steps 1 and 2 for all formats and test images. 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 portion) image. To test

gamma correction, you can use the SMPTE133 (checkerbox portion) 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.

• When testing for pixel anomalies use the Flat, Raster, and Ramp images. Use the

Raster and Flat images to look for pixels that may be stuck on or off, respectively.

The luminance should increase uniformly for the Ramp image. Also, look for

sparkles indicating problems with sampling.

• When testing for persistence with the animated images (for example, Cubes and

Persist), look for bleeding or trails in the wake of the moving object.

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 125 126

Sem comentários

Quantum-data 881 Manual do Utilizador Página 74