Keysight Technologies 85054B, User'S And Service Manual

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4- 2 85054B
Performance Verification
Introduction
Introduction
The performance of your calibration kit can only be verified by returning the kit to Keysight
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 Keysight Verifies the Devices in This Kit
Keysight 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 NIST (National Institute of Standards and Technology). 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 calibration device is electrically tested on this system. For the initial (before sale)
testing of the calibration devices, Keysight 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 Keysight to the extent allowed by the
Institute's calibration facility. The specifications data provided for the devices in this kit is
traceable to NIST through Keysight Technologies.