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This article details a process for calibrating your Colorsync 20-inch display to provide the best possible image. Display calibration should be done on a regular basis and whenever the display is connected to a different video source.
Note:
The ColorSync 20-inch Display was formerly named the AppleVision 850 Display.
DISCUSSION
The ColorSync 20-inch Display's high accuracy color is based on Apple's DigitalColor internal calibration technology which ensures that the display's color accuracy remains true over time and in a variety of ambient lighting conditions.
The ColorSync 20-inch Display calibrates itself by measuring the video amplitude of the Red, Green and Blue video signals generated by the source CPU. The display then calibrates the video parameters to provide the best image quality. Display recalibration should be done on a regular basis and whenever the display is connected to a different video source.
In order to obtain optimum viewing from your Apple ColorSync 20-inch Display the following steps must be performed when connecting the display to a computer:
Step 1
Open the Monitors and Sound control panel. (see Figure 1)
Figure 1: Monitors & Sound control panel.
Step 2
Set the brightness to a comfortable level, then set the contrast to the maximum level. These settings can be adjusted later to suit individual tastes.
Step 3
Set the desired working resolution and frequency.
Step 4
Click the Geometry button and adjust the Height/Width of the display so that there is a 0.25-inch border around the visible raster. (see Figure 2)
Step 5
Select and adjust the other geometry settings as necessary.
Figure 2: Geometry settings.
Step 6
Click the Convergence button and adjust the convergence according to the Convergence Control window which appears. (see Figure 3) Be sure to carefully inspect each region of the display when making the adjustments to ensure optimum visual quality. Convergence can have a significant effect on the readability of text. Convergence should be rechecked whenever the display is moved or rotated.
Figure 3: Convergence test pattern and control window.
Step 7
Click the Color button at the top of the Monitors & Sound window.
Step 8
Set the White Point, Gamma Curve, and Ambient Light settings according to personal preference.
Step 9
Click the Preferences button and change the settings to those shown in Figure 4.
Figure 4: Preferences window.
Step 10
Set the Calibration Accuracy slider bar in the Preferences window to the Pro (Prepress) option. The calibration process will take slightly longer, but is more suited to the environment that these displays are used in. Click the OK button to save the preferences selections.
Step 11
Select the Appropriate ColorSync Profile from the list provided and choose the Recalibrate button to apply these changes. (see Figure 5) The recalibration procedure will take 2-3 minutes to complete.
Figure 5: Selecting a ColorSync profile.