Calibration is the process of eliminating systematic, reproducible errors from the measurement results (system error correction). A measurement channel can be calibrated either manually or automatically using the Calibration Unit (accessory R&S ZV-Z51/-Z52 or R&S ZV-Z58):
In the following example a 2-port TOSM calibration is performed manually using the Calibration Wizard. Other calibrations can be performed in an analogous way.
Perform all channel settings for your measurement.
Click Channel – Calibration – Start Cal – Two Port P1 P2 – Manual... to open the calibration wizard for the desired calibration type.
In the Select Physical Port Connector(s) dialog, select the connector type that you use at port 1 and 2 (both connector types must be equal) and the calibration kit. Click Next > to access the Measure Standards dialog.
Connect an open standard to port 1 and click the corresponding box in the Measured Standards list to initiate the calibration sweep and acquire the calibration data for this standard.
Repeat the last step for a short and a match connected to port 1, an open, short and match connected to port 2, and for a through between both ports.
Click Apply to start the calculation of the system error correction data, apply them to the current channel and close the calibration wizard.
Replace the last measured standard with your DUT and perform calibrated measurements without changing the channel settings used for calibration.
You can also access manual calibration from the Measurement Wizard.
In the following example a 4-port TOSM calibration is performed using the calibration unit (accessory R&S ZV-Z51/-Z52 or R&S ZV-Z58). The calibration of other numbers of ports is analogous; see Performing an Automatic Calibration.
Connect the calibration unit:
Switch on and start-up your network analyzer and establish a USB connection to the calibration unit; see Connecting the calibration unit.
Connect ports 1 the unit to port 1 of the analyzer; repeat this for ports 2 to 4.
Perform the calibration:
Click Channel – Calibration – Start Cal – Four Port P1 P2 P3 P4 – Calibration Unit and wait until the calibration is completed. If a message box All test port connectors will be changed to <Connector type> pops up, confirm with OK.
Remove the connecting cables from the unit, connect your DUT instead and perform calibrated measurements.
You can also access automatic calibration from the Measurement Wizard.
