Using the Oxygen® Screen Calibration Chart
Files are included for the three most popular resolutions of projectors available today: 1280 x 1024 (SXGA), 1024 x 768 (XGA), and 800 x 600 (SVGA). Choose the resolution that is closest to what you will be using. Refer to the “Equipment Setup” document in the “Using Multimedia in Ministry” section for more information on these terms.
For PowerPoint® users, the chart is already loaded into the presentation. If you will be using other software, then load the jpeg file. The projector should warm up and run for at least five minutes prior to the following steps:
Focus / Sharpness The small text on screen is a good reference to set focus. If your projector has different settings for sharpness, this might be a good time to test them out.
Screen Edge The outer edge of the slide has a thick gray line on it. This line should be visible all the way around the edges on the screen. If it is not visible, move or zoom the projector to fi t on screen. This line can also be used to set the image to cover as much of your screen as possible. If you can’t see the edge of the slide all around you may need to adjust the image electronically in the projector. The method for doing this varies between different brands and models. The most common name for this feature is “Vertical / Horizontal Position”
Brightness/Contrast Before setting the brightness/contrast, it would be best to set the lighting in the room as close to the lighting conditions where you will be using the projector.
The grayscale chart of squares is used to determine “dynamic range”. This means how many levels of detail you can see between pure black (square A) and pure white (square Z). In an ideal situation, you should be able to see a difference between each square.
However, an image from a projector on a screen is almost always going to have less dynamic range than a computer monitor. Try to adjust the projector to be able to see as much of a difference as possible. A decent range would be being able to tell a difference between squares A & D as well as between squares W & Z.
The main controls used are the Brightness/Contrast controls, although some projectors may have more advanced options.
Distortion The circles in the corner of the chart should look like circles. In addition, they should all be the same size as each other. If they aren’t, your image is being distorted. This happens when the projector is at an angle from the screen. Ideally, the projector shouldn’t be too far off-line with the center of the screen. However, since this can be difficult in real-world settings, adjust controls on the projector to minimize the distortion. Different projectors use different terms to refer to their capabilities, but some common ones to look for are Keystone, Corner-pin, and Angle.
Design The two lines near the edge of the screen are the standard television guidelines for “Action Safe” and “Title Safe.” These guidelines indicate the amount of screen space that could get cut-off or cropped if this image was displayed on a normal TV. According to these guidelines, any text that needs to be displayed should fall within the title safe area. Any visual elements that need to be displayed should fall within the action safe area. The use of these guidelines will depend on your needs in the particular environment. If your church uses televisions to show screen content, or tapes your service for playback on TV, then it would be good to follow the guidelines. However, if your church only uses one screen then you can design the slide to take advantage of almost the entire screen area.
Focus Since you may have changed settings, check the focus again to make sure it is still as sharp as possible.
For further information, please refer to the owner’s manual of your particular projector make and model. You may also need to refer to the manuals for your computer software and hardware.
Click here to download the adobe acrobat reader version of the Oxygen Calibration Instructions.
Click here to download the picture for the 1024 x 768 Oxygen Calibration.
Click here to download the powerpoint file for the 1024 x 768 Oxygen Calibration.
Click here to download the picture for the 800 x 600 Oxygen Calibration.
Click here to download the powerpoint file for the 800 x 600 Oxygen Calibration.
Click here to download the picture for the Oxygen Calibration SXGA.
Click here to download the powerpoint file for the Oxygen Calibration SXGA.