Adjusting For Long Cables; Adjusting With An Oscilloscope; Adjusting Without An Oscilloscope; Specifications, Part Numbers, And Accessories - Extron electronics DA 6V EQ User Manual

Front Panel Features and Operation

Adjusting for long cables

If you are using long cables, you will need adjust the Gain and
EQ potentiometers (pots) until you have the best picture quality.
Using an oscilloscope is recommended; however, you can make
these adjustments without one. Both methods are described
below.

Adjusting with an oscilloscope

1. Feed a grayscale signal from an Extron VTG 300/400 or
other A/V test generator to the input of the DA AV EQ.
2. Remove the far end of the output cable from the display,
and connect it to the oscilloscope with 75 ohm termination.
3. Adjust the composite video or Y Gain pot to achieve 0.7
Vp-p for the white bar of the test pattern. For the S-video
models, adjust the C gain pot to achieve 0.3 Vp-p of color
burst level.
4. Adjust the EQ pot until no overshooting or round corners
appear on the test pattern.
5. Repeat steps 1 through 4 for all other output pairs.
6. Plug the far end of the cable back into the display device.

Adjusting without an oscilloscope

1. Feed a grayscale signal from an Extron VTG 300/400 or
other A/V test generator to the input of the DA AV EQ.
2. Adjust the composite video or Y Gain pot until the picture
from the display device appears to have the correct
brightness and contrast.
3. Adjust the EQ pot until the picture appears sharp and
without visible smearing.
4. Repeat steps 1 through 3 for all other output pairs.
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DA AV EQ Series • Front Panel Features and Operation
DA AV EQ Series
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Specifications, Part Numbers,
and Accessories

Specifications

Models

Included Parts

Optional Accessories