TM 11-6625-3025-14/ET426-AA-MMA-010/E154 VII210/T.O. 33A1-8-902-1-1
(11) Connect the video G output connector to the monitor input to display the H stripe pattern. Check that
when the pattern control is on WHITE, a white stripe covering 50% of the height of the raster is obtained
at the center of the raster, and when the pattern control is on BLACK, a black stripe of the same
proportion is obtained.
(12) Adjustment of the H stripe function is now complete
c.
Window.
(1) Select the WINDOW function
(2) The window pattern is a combination of the V stripe and H stripe signals, adjusted by the V stripe and H
stripe procedures.
(3) Observe the video portion of the signal while turning the VIDEO LEVEL control from 0 to 10. Video
amplitude should vary from 0.0v to 1.0v peak-to-peak +0.10v. The sync and blanking portions of the
composite video signal should remain at the levels set in signal level adjustments (paragraph 6-38).
(4) Connect the video output connector to the monitor input to display the window pattern. Set LEVEL on 10
or other desired level other than 0. A white window on black background with straight edges and no
distortion covering 25% of the raster area should be obtained. Check that when the pattern control is
set on BLACK, a black window on white background is obtained, and that when the pattern control is set
on WHITE, a white window on a black background is obtained.
(5) Performance of the window function is now complete.
6-42. Gray Scale Adjustment. This function develops a gray scale pattern of ascending (rising) slope. The ten step
scale (black, eight intermediate gray levels, and white) can be adjusted to provide the most usual linear "stairstep" pattern,
or logarithmic or other slope characteristic. The circuit cards involved include (figure FO-21):
Gray scale control ..................................................................................Position 5B
Gray scale ..............................................................................................Position 6B
1
Set function selector switch at GRAY SCALE.
2
Connect the oscilloscope channel 1 input to the video G output connector at the front panel
3
Connect the oscilloscope external sync input to the H drive source.
6-52
