Quantum-data 802BT Bedienungsanleitung PDF herunterladen (Seite 41)

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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

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