3-8 Keysight N5224A/25A Service GuideTests and AdjustmentsAbout System Verification and Performance Tests3-Instrument SpecificationsThe analyzer's instrument specifications are described in the Data Sheet andTechnical Specifications documents, available online at:http://literature.cdn.keysight.com/litweb/pdf/N5221-90002.pdf andhttp://literature.cdn.keysight.com/litweb/pdf/N5221-90001.pdf.These specifications apply when the analyzer is used to make either raw orerror-corrected measurements.System Verification ProcedureThe system verification procedure tests the network analyzer measurement“system”, as defined previously, against the system specifications. Ifconfirmation is successful, the measurement system is capable of makingmeasurements to the accuracy specified by the graphs of measurementuncertainty.The procedure consists of calibrating the analyzer with a calibration kit,measuring a set of characterized devices, and comparing the resultantmeasured data to the data and uncertainty limits supplied with the verificationkit. The device data provided with the verification kit has a traceable path toNIST. The total measurement uncertainty limits for the performanceverification are the sum of the factory measurement uncertainties and theuncertainties associated with measuring the same devices on the system beingverified. The difference between the factory-measured data and theverification-measured data must fall within the total uncertainty limits at allfrequencies for the total system uncertainty test to pass.Performance TestsPerformance tests are used to confirm analyzer performance against the“instrument” specifications. If confirmation is successful, the PNA meets theinstrument specifications.Performance tests are contained in the analyzer’s firmware with Options 897 or898 and are described at “Performance Tests” on page 3-31.An illustrated outline of the performance verification procedure:— for ANSI/NCSL Z540.3-2006 and ISO/IEC 17025 verification, is shown inFigure 3-1 on page 3-10.— for non-standards verification, is shown in Figure 3-2 on page 3-11.Calibration kits are different from verification kits. Calibration kits are usedto determine the systematic errors of a network analyzer measurementsystem. Verification kits are used to confirm system specifications and arenot used to generate error correction.
