Keysight Technologies 85058E User's And Service Manual

Contents

4-2 85058B/EPerformance VerificationIntroductionIntroductionThe performance of your calibration kit can only be verified by returning the kit to Keysight Technologies forrecertification. The equipment required to verify the specifications of the devices in the kit has beenspecially manufactured and is not commercially available.How Keysight Verifies the Devices in This KitKeysight 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 thatare directly traced to NIST (National Institute of Standards and Technology). The airline and shortcharacteristics are developed from mechanical measurements. The mechanical measurements andmaterial properties are carefully modeled to give very accurate electrical representation. The mechanicalmeasurements are then traced to NIST through various plug and ring gages and other mechanicalmeasurements.2. Each calibration device is electrically tested on this system. For the initial (before sale) testing of thecalibration devices, Keysight includes the test measurement uncertainty as a guardband to guaranteeeach device meets the published specification. For recertifications (after sale), no guardband is used andthe measured data is compared directly with the specification to determine the pass or fail status. Themeasurement uncertainty for each device is, however, recorded in the calibration report thataccompanies recertified kits.These two steps establish a traceable link to NIST for Keysight to the extent allowed by the institute’scalibration facility. The specifications data provided for the devices in this kit is traceable to NIST throughKeysight Technologies.