Keysight NFA Series Performance Verification And Calibration Manual page 106

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