86 Chapter 2
Test Descriptions
Measurement Jitter
Equation 2-3
where n = number of samples, ∑ = sum, x = measured values
Using an example result of approximately 2.5, the standard deviation
Lin
can be calculated as follows.
σ
nx
2
x
∑
2
–
∑
nn 1–()
-----------------------------------------=
σ =
√ 100*sum(value 1 to 100
2
) - (sum value 1 to 100)
2
/ 100(100-1)
= √ 100* 638.3963 - 63838.4147 / 9900
= √ 0.000123
= 0.011071
Lin
Table 2-23 Example worksheet
Y-Factor
Reading (Lin)
Y-Factor
Reading (Lin)
Y-Factor
Reading (Lin)
Y-Factor
Reading (Lin)
1-10 11-20 81-90 91-100
2.51173 2.53236 2.51882 2.54814
2.52119 2.52459 2.52375 2.51989
2.53333 2.52733 2.54246 2.52309
2.50778 2.50358 2.52668 2.52371
2.51997 2.52640 2.53861 2.53395
2.53139 2.52554 2.53976 2.54141
2.51906 2.53011 2.54001 2.52784
2.49573 2.51576 2.54133 2.50001
2.52075 2.54708 2.54232 2.54418
2.53547 2.53010 2.55278 2.52636
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