Teledyne-lecroy AORM - Advanced Optical Recording Measurements Uživatelský manuál stáhnout pdf (Strana 93)

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

3214

100%

2315

1389%=⋅ =.

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

⋅−+ ⋅−

+−

1389 3 1 6109 2 1

321

3208%

1 2 ... 88 89 90 91 92 93 94 95 96 97 98 ... 124 125

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Teledyne-lecroy AORM - Advanced Optical Recording Measurements Uživatelský manuál Strana 93