Fluke 54200, User Manual

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How to Use the Instrument
Description and Applications of the Test Patterns
4
4-59
SMPTE Color Bar
The SMPTE Color Baris according to SMPTE EG 1-1990.
Three horizontal bars comprises:
Bar 1:
Color bar, from left to right:
Grey, Yellow, Cyan, Green, Magenta, Red, Blue.
Bar 2:
Chroma set signal, from left to right:
Blue, Black, Magenta, Black, Cyan, Black, Grey.
Bar 3:
Black set signal.
For further details, see Figure 4-90.
The primary color signal levels are 75/7.5/75/7.5 for 525 line systems respectively
75/0/75/0 for 625 line systems.
1
2
3
4
5
6
7
8
525 Line Systems
-I
White
+Q
Black
Black 4.8 IRE
Black
Black 10.7 IRE
Black
625 Line Systems
-V
White
+U
Black
Black -1.6%
Black
Black +1.6%
Black
Figure 4-90. SMPTE Color Bar
Applications:
This pattern is intended to standardize the adjustment of chroma gain, chroma phase, and
black level monitor controls. The chroma set bar is arranged such below the regular color
bars that the blue channel is at full amplitude in both signals at the same time. For
correct adjustment of the color reproduction on a monitor, the red and green channels are
switched off. The monitor chroma gain is adjusted by matching the brightness of the
outer left or right main blue bar with the chroma set bar just below. In a similar way, the
chroma phase is adjusted by matching the brightness of either center main blue bar with
the chroma set bar just below. The lower PLUGE part of the signal permits adjusting the
monitor brightness and contrast. The monitor brightness control is adjusted in a way so
that the 'whiter-than-black bar' (7) is visible with respect to the black surround but the
'blacker-than-black bar' (5) is not visible. The color reference signals -I and +Q can be
used for phase relationship adjustment by a vectorscope.