Chapter 2 83
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
nx
2
x
∑
2
–
∑
nn 1–()
-----------------------------------------=
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