PR-655/670 User Manual
62
D
ISPLAY
O
PTION
Two options are available in this field:
Match Sample and Match Data.
In
Match Sample
mode, white point calibrations are based on a measured reference value.
Match Data
mode allows the user to enter target values in terms of luminance (Y) and CIE 1931 x, y values.
Whichever method is chosen, all
R
G
B
measurements require that a phosphor (either stored or custom) be
selected and that a reference white point is set.
S
ELECTING A
P
HOSPHOR
Proper white point calibration is dependent on the color characteristics of the display primaries. Phosphor is
used as a historical reference to CRT’s. The data for several types of phosphors are pre
-stored in the PR-655 /
PR-670. They are CIE, NTSC, EBU (PAL / SECAM), SMPTE and HDTV. The user may also enter display primary
chromaticity values, or used measured values.
1.
To select a phosphor set touch
Select
located to the right of the
yb
window. The following screen
appears:
FIGURE 56 -
R
G
B
PHOSPHOR SELECT SCREEN
1.
Touch the
▲▼
icons in the
Phosphors
field
to select pre-stored values or
Custom.
If
Custom
is
selected, the user may enter the values in the
Red, Green
and
Blue
fields by touching the field located
to the right of the field title. For example, touch the field next to
xr
to display a data entry window as in
the following example:
