Quantum Data 881 User Manual page 917

CirclesS
Description
Purpose
ColorBar
Description
882 Video Test Instrument User Guide (Rev A.35)
Special test image developed per customer specifications. In the primary version (shown
below), the image consists of eight small white circles on a black background. The circles
are positioned in the corners of the active video area and centered on each edge of the
active video area. The secondary version inverts the image to black circles on a white
background.
This pattern is specified by some monitor manufacturers for checking and adjusting video
scan size, linearity, and over scanning.
The primary version (shown below) has 16 full-height vertical color bars. The secondary
version splits the field into a top and bottom half. The bars in the bottom half of the screen
are in reverse order.
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