![Keysight N4431D Reference Manual Download Page 33](http://html1.mh-extra.com/html/keysight/n4431d/n4431d_reference-manual_1961141033.webp)
Electronic Calibration Modules Reference Guide 1-25
General Information
Service and Recertification
What Is Provided with a Recertification
— a new calibration sticker affixed to the module
— a certificate of calibration
— a list of United States National Institute of Standards and Technology
(NIST) traceable numbers
— a calibration report for each traceable module listing measured values,
specifications,
and uncertainties
— a new set of S-parameter data (embedded in module memory) if the old set
of S-parameters data no longer allows for a calibration that meets all
performance specifications
Keysight Technologies offers different types of calibration for the recertification
of the module. For more information, contact Keysight. See