PR-680/680L User Manual
10
S
ETTING UP
RGB
M
EASUREMENTS
Prior to making
R
G
B
measurements, the proper parameters must be entered into the
R
G
B
setup menu
to insure correct results.
FIGURE 55 - RGB DISPLAY CAL SETUP SCREEN
D
ISPLAY
O
PTION
Two options are available in this field:
Learn and x, y Data.
In
Learn
mode, white point calibrations are based on a measured reference display.
X, y 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Phosphor is used as a historical reference to CRT’s.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-680/680L / PR-680/680L. 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: