HDM 5049 PLUS
Operation And Adjustment
Page 4-9
4.5.3 Uniformity
Select a setting with
or
and press
, or press
first to turn Scrollbar on or
off.
Scrollbar on:
Scrollbar off:
Adjust with
or
then press
. Press
to leave the Uniformity menu. If changes
have been made, you will be asked to save or to
discard these changes:
Press
to select yes or no, then press
.
Moiré canceler
When a disturbing Moiré pattern is visible caused by the superposition of the image pattern and the
display’s raster pattern, you can eliminate it by adjusting the Moiré canceler.
The visibility of Moiré patterns depends on the geometry settings. Making small changes to the
vertical size of the picture can reduce Moiré significantly.
Dynamic H focus
Adjust in case horizontal lines appear to be unsharp in the middle of the picture.
V WH Uniformity
The Vertical White Uniformity compensates for the
vertical component of the earth’s magnetic field. The
vertical component causes a horizontal deviation of
the electron beam. The compensation is a DC current
through the degauss coils in the top and bottom of the
monitor’s bezel. After adjusting this setting, the monitor
degausses automatically.
Adjust in case of purity or white uniformity errors, in
particular in the middle of the screen, using a
microscope to check the beam landing.
AX WH Uniformity
The Axial White Uniformity compensates for the axial
component of the earth’s magnetic field. When this
axial component enters the monitor from the front or
rear side, it causes an electron beam rotation. As a result the beam landing is affected. The factory
adjustment is 127 (no compensation), since it is factory-aligned with the picture tube facing east,
with the axial component entering from the left side of the monitor. The compensation is a DC
current through a coil surrounding the tube’s front side.
Adjust in case of purity or white uniformity errors at the edges of the screen, using a microscope to
check the beam landing.
S
Vertical
Axial
N
