P A T T E R N U S A G E
1)
Cross-Hatch
The center dot is used to adjust the static conver-
gence of the picture tube. The cross-hatch pattern is
used for adjustment of the dynamic convergence,
and for the adjustment, investigation, and remedia-
tion of raster alignment parameters such as vertical
and horizontal amplitude, and vertical and horizontal
linearity.
2 ) Center-cross
Used for the picture tube's horizontal and vertical
position adjustment.
3 )
Dot
Used for adjustment of the picture tube's static
convergence and focus.
4 ) Raster
The red, blue, and green raster patterns are used to
adjust and confirm color picture tube purity.
5 ) Window
Used for the adjustment of video circuits, and for
the evaluation of high-voltage stability.
6)
Color Bar
a. Split Color Bar (Set Color Selector to "ON" Posi-
tion)
Used for adjustment of CHROMA circuits and
ACC (automatic color control) in TV receivers,
and for setting of CHROMA levels, A C C ,
CHROMA level balance, and burst gate (ampli-
tude, phase) in VTRs.
b. Full-Field Color Bar (Set I.O W. [ U . V . W . ] to"
OFF")
Used when the Q, - I [ U , V ] and white signals
are not required for operations such as adjust-
ment of " a " above.
c. Gray Scale
Gray scale patterns can be obtained by removing
the chrominance component from the color bar
(by pressing the Color Selector "CHROMA OFF"
button) to display only the luminance component.
These patterns can be used for the adjustment,
investigation, and repair of linearity, white bal-
ance, and other parameters crucial in image
amplification in devices such as TV receivers and
VTRs.
d. CHROMA Signal
The chrominance-only pattern can be obtained
by removing the luminance signal from the Color
Bar (by pressing the Color Selector "LUMI OFF"
button). This pattern can be used to investigate
CHROMA signal levels and phase changes as
related to image amplification.
e. Black burst
Removal of the luminance and chrominance
component from the full-field color bar signal
results in a "black burst" signal containing COM-
POSITE SYNC and SETUP components.
f. Composite sync
If the luminance and chrominance signals are
removed from the split color bar, the result is a
signal containing only the COMPOSITE SYNC
and SETUP com-^nents.
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