Aorm software package – Teledyne LeCroy AORM - Advanced Optical Recording Measurements User Manual
Page 93
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AORM Software Package
923133 Rev A
ISSUED:
June 2013
91
The 3T timing jitter is calculated by taking the standard deviation of the difference between each
width and the 3T mean. This is 3.214 ns, normalized by:
Timj
T
3
3 214
100%
2315
1 389%
=
⋅
=
.
.
.
The 4T timing jitter cannot be calculated because there is only one value (at least two values are
required).
The 5T timing jitter is +6.109%.
The overall timing jitter is calculated using a weighting formula, which results in the standard
deviation of the mean centered distributions. In this example, it is calculated as:
(
)
(
)
(
)
Timj
overall
=
⋅ − +
⋅ −
+ −
=
1 389
3 1
6109
2 1
3 2 1
3 208%
2
2
.
.
.
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