Checking Chroma
/Luma Delay (Lightning Display)
10. Determine wher
e transitions intersect the
delay scales and derive the timing error
in nanoseconds, as deflected from the
center mark:
The center mark
oftheninemarks
spanning each green-magenta
transition is the zero error point.
Alignment to a mark towards black
means the colo
r-difference signal
lags with respect to luma.
Alignment to a mark towards white
means the color-difference signal
leads the lum
a signal.
The upper hal
fofthedisplay
measures the Pb to Y timing; the
bottom half measures the Pr to Y
timing.
The + tic m
arks on the graticule indicate the following timing errors:
Tic Mark SD Timing Error (ns) HD Timing Error (n s )
1080p 50,
59.94, 60 (dual link
formats) Timing Error (ns)
0marks000
1st 20 2 1
2nd 40
5
2.5
3rd 74
1
13.5 6.75
4th 148
2
27 13.5
1
Luma sample
2
Chroma sample
44 Waveform Rasterizers Quick Start User Manual
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