Agilent Technologies NFA Series, Performance Verification And Calibration Manual

Page: 93 / 184

Chapter 2 81
Test Descriptions
Measurement Jitter
Measurement Jitter
Test Description
A noise source is connected to the NFA's input. The Analyzer then measures linear
Y-Factor over 100 samples. The standard deviation is then calculated using the
"non-biased" or "n-1" method. STDEV uses the following formula:
Equation 2-2
The linear value is then converted to Log10 to give the Y-factor Standard Deviation
with no averaging.
Test Specification
Jitter with no averaging: Y-factor Standard Deviation <0.10dB
Related Adjustment
None
σ
n x
2
x
∑
⎝ ⎠
⎛ ⎞
2
–
∑
n n 1 –
( )
----------------------------------------- =