Quantum Data 801GC, 801GF, 801GX manual Following tests are based on the original Smpte

	The following tests are based on the original SMPTE
	quideline:
Test:	Visual Chroma Gain Adjustment
Method:	In order to perform this test, you must have a way
	of turning off the red and green guns in the monitor
	under test. Turning off the red and green video
	components of the 801GX’s video output will not
	work for this test.
	This test uses the upper and central color bars. Switch
	off the red and green guns on the monitor. This will
	produce four blue bars, separated by black bars.
	Adjust the chroma gain so that the brightness of
	each outer blue bar is uniform over the entire bar.
	The gain is correct when the bottom 10% of each
	bar is the same brightness as the rest of the bar.
Test:	Visual Chroma Phase Adjustment
Method:	In order to perform this test, you must have a way
	of turning off the red and green guns in the monitor
	under test. Turning off the red and green video
	components of the 801GX’s video output will not
	work for this test.
	This test uses the upper and central color bars. Switch
	off the red and green guns on the monitor. This will
	produce four blue bars, separated by black bars.
	Adjust the chroma phase so that the brightness of
	each of the two central blue bars is uniform over
	the entire bar. The phase is correct when the bottom
	10% of each bar is the same brightness as the rest of
	the bar.
Test:	Visual Black Level Adjustment
Method:	This test uses the lower right hand portion of the
	image. Reduce the black level until the gray bar
	disappears. Slowly increase the black level until the
	bar just becomes clearly visible.

4-65