Chapter 2 2-3
System Verification and Performance Tests
Introduction
These specifications apply when the analyzer is used to make measurements other than
error-corrected measurements. An example would be the measurement of amplifier gain
compression. In such cases, the analyzer’s output and input behavior such as source power,
receiver accuracy, and receiver linearity are important and are covered in sections
previously listed.
Performance tests are used to confirm that the analyzer meets the instrument
specifications.
System Verification Procedure
The system verification procedure tests the network analyzer measurement system, as
defined previously, against the system specifications. If confirmation is successful, the
measurement system is capable of making measurements to the accuracy specified by the
graphs of measurement uncertainty. An outline of the system verification procedure
follows:
• The measurement system is calibrated with the same calibration kit that will be used
for future measurements. The measurement system’s systematic errors are determined
by this procedure.
• The verification-kit test devices are measured with error correction applied.
• These measurements are compared to measurement data stored on a unique,
serial-numbered data disk included with the verification kit.
• The measurement system passes the system verification procedure if the
measurements of the test devices differ from the measurement data on the data disk by
less than specified test limits. The test limits account for the specified accuracy of the
measurement system and the measurement uncertainties attributed to the stored data
for the test devices.
NOTE Calibration kits are different from verification kits. Calibration kits are used
to determine the systematic errors of a network analyzer measurement
system. Verification kits are used to confirm system specifications and are not
used to generate error correction. For example, the HP/Agilent 85031B is a
7-mm calibration kit, but the HP/Agilent 85029B is a 7-mm verification kit.
Performance Tests
Performance tests are used to confirm analyzer performance against the instrument
specifications. If confirmation is successful, the analyzer meets the instrument
specifications as defined above. If the calibration kit to be used for measurements is also
certified, successful completion of the performance tests also ensures that the network
analyzer measurement system meets the system specifications.
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