Keysight Technologies 11644A K, Руководство пользователя и сервисное руководство

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5-2 X, P, and K 11644A
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 and calibration standards required to verify the specifications of the limits of
the devices in the kit have been specially manufactured and are not commercially available.
How Keysight Verifies the Devices in Your 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 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 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 the kit is traceable to NIST through
Keysight Technologies.