VIS-CAM System
Figure 35. Focus Bar Waveform display.
5.Gently snug the zoom and focus lens holder thumbscrews against the lens without changing any of the lens settings.
6.Uncover the license plate by removing the lens focus chart.
7.Use the mouse to move the waveform cursors to the top and bottom of the waveform amplitude variation. The “Black Cursor” is located at the bottom of the waveform display, and the “White Cursor” is located on the top of the waveform display.
8.Verify that the waveform amplitude variation (for characters in both direct light and shadow, if possible) is at least 25 and that no portion of the waveform fully saturates either black or white.
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