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E4991B Impedance Analyzer Firmware Update

Please note that you DO NOT need to return your E4991B to Keysight service center for updating the firmware. The E4991B firmware upgrade can easily be performed on your own with the information and tools available on this Web page.

Release Date Version Version Description
2019-03-15 A.02.02 E4991B Firmware Revision A.02.02 (For Windows 7 and Windows 10)

How to Download

How to Install

  • Extract the files by selecting the temporary directory and unzip the .exe files by double-clicking on the file.


  • Does Not Require a License

Supporting Documentation


Installs on:


Operating System

  • Windows 7
  • Windows 10


  • No specific prerequisites.

Supported Instruments

  • E4991B

Related Links