Quantum Data 802BT, User Manual

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802BT/802R Video Test Generator User Guide 627
Method The convergence adjustments of most color monitors fall into two main categories. The
first set of adjustments, usually called Static Convergence, aligns the three beams in the
center of the display. This method involves turning on all three guns and adjusting the
various magnets on the convergence assembly to produce all white dots in the center of
the display. The convergence assembly is located on the neck of the CRT. Different
monitors and CRT types may each require their own magnet-adjustment sequence.
After the center of the display is properly converged, the outer areas are adjusted by using
the monitor’s Dynamic Convergence controls. The number of controls, the area of the
screen they affect, and their adjustment procedure depends on the monitor under test.
Test Focus adjustments
Purpose An out-of-focus monitor displays fuzzy pixels which, in turn, result in poorly formed and
hard-to-read 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 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 they affect depend on the monitor under test.
DV_Swing
Description This image is only available with DVI and HDMI. The DV_Swing image is used to
temporally change the digital video swing (DVSS format parameter) between 90 and 1620
mVp-p of the HDMI and DVI digital output for the active format. This image displays the
current video swing value over a graduated (ramp) background. This image is supported
by HDMI boards (revision F or later), and DVI boards with FPGA F1 or later.