802BT/802R Video Test Generator User Guide
31
Testing analog computer (IT) CRTs
This section describes how to test analog computer (IT) displays.
To test an analog computer CRT:
1. Use a standard VGA cable to connect the VGA connector on the generator with the
VGA connector on the display under test.
2. Calibrate the generator by holding down the
R, G
and
B
keys while starting the
generator. See “
Calibrating the generator
” on page 47.
You can also calibrate the generator by entering the following command:
SCAL
When calibrating the generator, if you load the analog outputs (as they will be loaded
when conducting testing) then the calibrations will be slightly more accurate. This is not
required however. Also, loading the unused outputs with 75 ohms will optimize signal
damping.
3. (Optional) Enable the Status Display mode and Analog Friendly mode (see “
Special
operating modes
” on page 18). The Analog Friendly mode ensures that the generator
will output an analog signal. The Status Display mode enables you to view the current
output characteristics on the LCD.
4. Determine the formats to test (see “
Selecting formats automatically
” on page 25).
5. (Optional) To view the EDID on the display, use the
Image
knob to select the EdidData
image and follow the directions on the display. You may wish to view the EDID data to
verify that the formats required for testing are specified in the EDID.
Alternatively, you can load the image with the following command:
IMGL
EdidData;
IMGU
6. Determine additional formats to test based on the resolution of the display. The VESA
formats are shown below:
Standard
Quantum Data format name
VGA
DMT06xx
SVGA
DMT08xx
XGA
DMT10xx
SXGA
DMT12xx
UXGA
DMT16xx
QXGA
DMT20xx
QSXBA
DMT25xx
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 ...