Agilent Technologies 85051B, User'S And Service Manual

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4- 2 85051B
Performance Verification
Introduction
Introduction
The performance of your verification kit can only be verified by returning the kit to Agilent Technologies for
recertification. The equipment required to verify the specifications of the devices in the kit has been
specially manufactured and is not commercially available.
How Agilent Verifies the Devices in Your Kit
Agilent verifies the specifications of these devices as follows:
1. The residual microwave error terms of the test system are verified with precision airlines and shorts that
are directly traced to the National Institute of Standards and Technology (NIST). The airline and short
characteristics are developed from mechanical measurements. The mechanical measurements and
material properties are carefully modeled to give very accurate electrical representation. The mechanical
measurements are then traced to NIST through various plug and ring gages and other mechanical
measurements.
2. Each device is electrically tested on this system. For the initial (before sale) testing of the devices,
Agilent includes the test measurement uncertainty as a guardband to guarantee each device meets the
published specification. For recertifications (after sale), no guardband is used and the measured data is
compared directly with the specification to determine the pass or fail status. The measurement
uncertainty for each device is, however, recorded in the calibration report that accompanies recertified
kits.
These two steps establish a traceable link to NIST for Agilent to the extent allowed by the institute’s
calibration facility. The specifications data provided for the devices in the kit is traceable to NIST through
Agilent Technologies.