Chapter 4 161
Calibration
Adapter Characterization
4. Calibration
Concept
Adapter characterization is a function that calculates the S-parameters of an adapter based
on 3 measurement results obtained by using open/short/load standards connected to the test
port, via the adapter, for which 1-port calibration has been performed. This VBA macro
uses test port 1 for this measurement.
The S-parameters of the adapter can be calculated from the above 3 measurement results.
However, you can calculate the S-parameters more accurately by connecting the adapter to
the test port in the reverse direction, measuring 3 more results in the same way as above,
and using the above 3 results with the 3 new results (a total of 6 measurement results). This
VBA macro uses test port 2 for the measurement made when the adapter is connected in
the reverse direction.
Figure 4-40 Adapter characterization
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