Quantum Data 802BT - Manual (Page 41)

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