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Reference
WFM 601A, WFM 601E & WFM 601M User Manual
3–31
The Arrowhead gamut display plots luminance (Y) against chrominance (C) to
check if the composite signal adheres to standard gamut. Figure 3–24 shows
NTSC and PAL Arrowhead displays (75% Color bars) and indicates the values of
the graticule lines. The arrow-head shape of the graticule results from overlaying
the standard limits for luminance and luminance plus peak chrominance.
Alarm level
cursor
Y Ampl
C Ampl
–40 IRE
100 IRE
131 IRE
Current alarm
level setting
NTSC display
120 IRE
NTSC
120 IRE
Y Ampl
C Ampl
–300 mV
PAL display
700 mV
Alarm level
cursor
950 mV
Current alarm
level setting
PAL
700 mV
| C |
Y
| C |
Y
Figure 3–24: NTSC and PAL Arrowhead gamut displays
Arrowhead Gamut