Alignments
8.
8.3.5
Geometry
The geometry alignments menu contains several items to align
the set, in order to obtain correct picture geometry.
Geometry
Figure 8-5
Connect an external video pattern generator to the aerial input
of the TV-set and input a crosshatch test pattern. Set the
generator amplitude to at least 1 mV and set frequency to
475.25 MHz (PAL).
1.
Activate the SDAM menu (see chapter 5).
2.
Go to the GEOMETRY sub menu.
Now you can perform the following alignments:
•
Horizontal Parallelogram (HP) Align straight vertical lines
in the top and the bottom; vertical rotation around the
centre.
•
Horizontal Bow (HB) Align straight horizontal lines in the
top and the bottom; horizontal rotation around the centre.
•
Horizontal Shift (HS) Align the horizontal centre of the
picture to the horizontal centre of the CRT.
•
Vertical slope (VS) Align the vertical centre of the picture
to the vertical centre of the CRT. This is the first of the
vertical alignments to perform. For an easy alignment, set
SBL to ON.
•
Vertical Amplitude (VA) Align the vertical amplitude so
that the complete test pattern is visible.
•
Vertical S-Correction (SC) Align the vertical linearity,
meaning that vertical interval of a grid pattern must be
equal over the entire screen height.
•
Vertical Shift (VSH) Align the vertical centring so that the
test pattern is located vertically in the middle. Repeat the
'vertical amplitude' alignment if necessary.
•
Service blanking (SBL) Switch the blanking of the lower
half of the screen ON or OFF (to be used in combination
with the vertical slope alignment).
For EW versions :
•
Set Horizontal Parallelogram HP to prevent the picture
from slanting to one side.
•
Set Horizontal Bow HB to prevent the top and bottom of
picture from bending to the sides.
•
Select Vertical Zoom VX to align the vertical linearity over
the entire screen height (for 16 : 9 applications only).
•
Set Trapezium Correction TC to align the lines at the
vertical sides.
•
Select East-West Width EW and align the picture width
until the side castellations disappear.
•
Select East-West Parabola / width PW and align the
vertical sides until the sides are straightened.
•
Select Upper Corner Parabola UCP to straighten the top of
the vertical lines at the sides.
•
Select Lower Corner Parabola LCP to straighten the
bottom of the vertical lines at the sides.
•
Repeat the last 5 steps if necessary.
Geometry alignments menu
Table 8-5
CL 16532108_015.eps
310801
1
2
3
4
5
6
7
VERT. SLOPE
VERT. SHIFT
VERT. AMPLITUDE
V.S-CORRECTION
HOR. SHIFT
HOR. PARALLELOGRAM
HOR. BOW
S
VX
XX
SC
XX
SBL
ON/OFF
VS
XX
VSH
XX
VA
XX
HS
XX
EW
XX
PW
XX
UCP
XX
LCP
XX
TC
XX
HP
XX
HB
XX
Summary of Contents for L01H.1A
Page 5: ...Directions for Use EN 5 L01H 1A 3 3 Directions for Use ...
Page 7: ...Directions for Use EN 7 L01H 1A 3 ...
Page 8: ...Directions for Use EN 8 L01H 1A 3 ...
Page 9: ...Directions for Use EN 9 L01H 1A 3 ...
Page 10: ...Directions for Use EN 10 L01H 1A 3 ...
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Page 12: ...Directions for Use EN 12 L01H 1A 3 Personal Notes ...