System Verification; What The System Verification Verifies; Measurement Uncertainty - Keysight Technologies N5247B Service Manual

Tests and Adjustments

System Verification

System Verification
System verification is used to verify system-level, error-corrected uncertainty
limits for network analyzer measurements. The verification procedure is
automated and is contained in the firmware of the analyzer.
The device data provided with the verification kit has a traceable path to a
national standard. The difference between the supplied traceable data and the
measured data must fall within the total uncertainty limits at all frequencies for
the system verification to pass.
The total measurement uncertainty limits for the system verification are the
sum of the factory measurement uncertainties for the verification devices and
the uncertainties associated with the system being verified. You can determine
your system measurement uncertainty limits by referring to the analyzer
embedded on-line help.
Passing this system verification does not guarantee that the analyzer
meets all of its performance specifications. However, it does show that the
network analyzer being verified measures the same devices with the same
results as a factory system which has had all of its specifications verified
and its total measurement uncertainty minimized.

What the System Verification Verifies

The system verification procedure verifies proper operation of the:
— network analyzer
— calibration kit
— test port cables
together as a "system". It DOES NOT verify that any of these components pass
their specifications independently. The user is responsible for independently
calibrating and verifying the proper operation of the calibration kit and test
port cables prior to performing the system verification.
Additional equipment or accessories used with the above system are not
verified by system verification.

Measurement Uncertainty

Measurement uncertainty is defined as the sum of:
— the residual systematic (repeatable) errors, and
— the random (non-repeatable) errors
in the measurement system after calibration.
The systematic errors are:
3-22 Keysight N5247B Service Guide