Technical data

5-39
Operating Concepts
Measurement Calibration
Figure 5-38. Full Two-Port Error Model Equations
How Effective Is Accuracy Enhancement?
In addition to the errors removed by accuracy enhancement, other systematic errors exist due to
limitations of dynamic accuracy, test set switch repeatability, and test cable stability. These, combined with
random errors, also contribute to total system measurement uncertainty. Therefore, after accuracy
enhancement procedures are performed, residual measurement uncertainties remain.
The uncorrected performance of the analyzer is sufficient for many measurements. However, the next
three illustrations show the improvements that can be made in measurement accuracy by using a more
complete calibration routine. See Figure 5-39, and Figure 5-40 on page 5-40, and Figure 5-41 on page 5-41.