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SDS6000L User Manual
2 6 2 i n t . s i g l e n t . c o m
Eye Height
The vertical opening of an eye diagram. Estimated based on the vertical
distribution of the measured high-voltage and measured low-voltage in the
40% to 60% UI interval.
( ) ( )
1 1 0 0
EyeHeight= V -3 - V +3
1-level
The high voltage corresponds to 1-level in the diagram. The one level is
calculated as the mean value of the top histogram distribution in the middle
20 percent of the eye period
0-level
The low voltage corresponds to the 0-level in the diagram. The zero level
comes from the histogram mean value of the data captured inside the
middle 20 percent of the eye period
Eye Amplitude
The eye amplitude describes the voltage between 1-level and 0-level
Rise Time
The duration of rising time from 20% to 80%
Fall Time
The duration of falling time from 80% to 20%
Eye Crossing
The measure of the amplitude of the crossing point relative to the one and
zero level
Crossin g 0
10
VV
Crossing(%)=
VV
−
−
Signal-to-Noise
Ratio
The ratio of the desired signal level to the level of background noise.
10
10
VV
Q=
−
+
Average Power
The average value of the whole data stream. A higher percentage of 1-
level comes with a higher average power. The figure comes to 50% of eye
amplitude when the 1-level and 0-level account for the same probability
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