640 Appendix B Image Reference
Purpose An out-of-focus monitor displays fuzzy graphic images and poorly formed, hard-to-read
text characters.
Method On monitors with a single (static) focus adjustment, adjust the control for the best average
focus over the entire screen. The focus at certain locations of the screen should be within
specified limits.
Some monitors have a static and one or more dynamic focus controls. The sequence for
adjusting them and the areas of the screen that they affect depend on the monitor under
test.
Format
Description A listing of the data contained in any format. The primary image lists the settings of the
format driving the display. The secondary image can be used to list the contents of any
stored format (via the Location field).
This pattern works best at display resolutions of at least 640 pixel by 480 lines.
FormatRx
Description Used by analzyer to view timing parameters measured from external signal. For more
information, see “Measuring timing of video signal” on page 114.
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