Checking Chroma/Luma Delay (Lightning Display)
10.
Determine where transitions intersect
the delay scales and derive the timing
error in nanoseconds, as deflected from
center mark. See the following table.
The center mark of the nine marks
spanning at each green-magenta
transition is the zero error point.
Alignment to a mark towards black
means the color-difference signal
lags with respect to luma.
Alignment to a mark towards white
means the color-difference signal
leads the luma signal.
The upper half of the display
measures the Pb to Y timing; the
bottom half measures the Pr to Y
timing.
11.
You can use the V Gain and H Gain
settings (touch the readouts and use the
knob to adjust) to expand the scale of
the Lightning display to make it easier to
read the delay scale.
De
fl
ection
SD
HD
0 marks
0 ns
0 ns
±1 mark
20 ns
2 ns
±2 marks
40 ns
5 ns
±3 marks
1
74 ns
13.5 ns
±4 marks
2
148 ns
27 ns
1
Luma sample
2
Chroma sample
104
Quick Start User Manual
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