Checking Gamut
Checking Composite Gamut
The Arrowhead gamut display plots luminance (Y) against chrominance (C)
to check if the composite signal adheres to standard gamut. NTSC and PAL
Arrowhead displays (75% Color bars) and indicates the values of the graticule
lines. The arrowhead shape of the graticule results from overlaying the standard
limits for luminance and luminance-plus-peak chrominance. (See Figure 48.)
Figure 48: Arrorwhead gamut display plots
Set the thresholds for gamut. (See page 97,
.) After
selecting the
Arrowhead
display, compare the signal to the display to determine
out-of-gamut composite components. Note the following:
Signals exceeding the luminance amplitude gamut extend above the top
horizontal limit (top electronic graticule line).
Signals exceeding the luminance plus peak chrominance amplitude gamut
extend beyond the upper and lower diagonal limits.
The bottom horizontal line shows the minimum allowed luminance level. 0 or
7.5 IRE for NTSC and 0 mV for PAL.
WVR5200 Waveform Rasterizer User Manual
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Summary of Contents for WVR5200 Series
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