Keysight N9923-90001 User’s Guide117Calibration for NA, CAT, and VVM ModesStandards: OPEN or SHORT on ONE portSweeps in BOTH directions.Isolation Step of a 2-Port CalThe optional isolation step of a calibration corrects for crosstalk which is theinternal signal leakage between the test ports. The Isolation step measuresLoad standards that are connected to one or both FieldFox test ports.Perform an isolation calibration when you are testing a device with highinsertion loss, such as the stop band of a filter or a switch in the open position.The isolation step can add noise to the error model when the measurement isvery close to the noise floor of the analyzer. To improve measurementaccuracy, set a narrow IF Bandwidth during the calibration.The Isolation step is NOT allowed with ECal or QuickCal.How to perform the additional Isolation step— Press Cal 5 then Mechanical Cal / ECal— Then Advanced— Then Omit Isolation—OFF Perform the Isolation step—ON (default) Omits the Isolation step— Then — Configure and perform the calibration as usual. At the first step of the Calyou will be prompted to connect a Load standard to one or both test ports.— This setting survives an Instrument Preset.Waveguide CalibrationsIn general, calibrating with Waveguide is very similar to calibrating with coax.However, most coax mechanical Cal Kits have standards that can be used overa very wide frequency range. Waveguide Cal Kits are used over a narrowfrequency range. Therefore, it is VERY IMPORTANT to set the frequency rangeof the measurement WITHIN the frequency range of the waveguide Cal Kit.Otherwise, an error message will appear during the ‘Calculating Steps’ portionof the calibration.If the first calibration step does NOT prompt you to connect Loadstandards, then the Cal Kit probably does not contain an Isolationstandard. You can use DataLink software to edit the Cal Kit and add anisolation standard using a Load standard. See Data Link Help for moreinformation:http://na.support.keysight.com/help/DataLinkHelp/DataLink.htm
