Keysight recommends using the most current version, which includes the most up-to-date bug fixes and security patches available.
Release Date Version Version Description
2026-06-10 1.1.14 AP4021A / AP4022A Firmware
Release Date Version
2026-06-10 1.1.14
Version Description
AP4021A / AP4022A Firmware

How to Download

  • Click the download link and save the firmware package. Do not unpack the archive, the update process needs the package as .tar archive file.

How to Install

  • Open the "AP40XX / AP50XX Signal Source GUI" and connect to the device
  • Select "Device" -> "Update Firmware"
  • Select the downloaded TAR file in the file dialog
  • Wait until installation has finished
  • Restart the device and confirm the new firmware version on the front panel (tap on CONF, then INFO)

Licensing

  • Does Not Require a License

Supporting Documentation

Download

Installs on: Instrument

Operating System

  • Linux

Prerequisites

Supported Instruments

  • AP4021A, AP4022A
  • APSYN140(-X)

How to Download

  • Click the download link and save the firmware package. Do not unpack the archive, the update process needs the package as .tar archive file.

How to Install

  • Open the "AP40XX / AP50XX Signal Source GUI" and connect to the device
  • Select "Device" -> "Update Firmware"
  • Select the downloaded TAR file in the file dialog
  • Wait until installation has finished
  • Restart the device and confirm the new firmware version on the front panel (tap on CONF, then INFO)

Licensing

  • Does Not Require a License

Supporting Documentation

Installs on: Instrument

Operating System

  • Linux

Prerequisites

Supported Instruments

  • AP4021A, AP4022A
  • APSYN140(-X)

How to Download

  • Click the download link and save the firmware package. Do not unpack the archive, the update process needs the package as .tar archive file.

How to Install

  • Open the "AP40XX / AP50XX Signal Source GUI" and connect to the device
  • Select "Device" -> "Update Firmware"
  • Select the downloaded TAR file in the file dialog
  • Wait until installation has finished
  • Restart the device and confirm the new firmware version on the front panel (tap on CONF, then INFO)

Licensing

  • Does Not Require a License
Download

Installs on: Instrument

Operating System

  • Linux

Prerequisites

Supported Instruments

  • AP4021A, AP4022A
  • APSYN140(-X)
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