The test ports of the Analyzer are defined by means of calibration. The test port is a connector accepting a calibration standard in the process of calibration.
A connector on the front panel of the Analyzer will be the test port if the calibration standards are connected directly to it.
Sometimes it is necessary to connect coaxial cable and/or adapter to the connector(s) on the front panel for connection of the DUT with a different connector type. In such cases connect calibration standards to the connector of the cable or adapter.
The figure below represents two cases of test port defining for the measurement of the DUT. The use of cables and/or adapters does not affect the measurement results if they were integrated into the process of calibration..
Test Port Defining
The term calibration plane is used in some cases. A calibration plane is an imaginary plane located at the ends of the connectors, which accept calibration standards during calibration.
Calibration Planes
