Contact an Expert

FieldFox Analyzer Current Firmware (all FieldFox models)

To upgrade firmware:

  1. Power on the FieldFox
  2. To view the current installed firmware in FieldFox
    • Press System (7), press Service Diagnostics, press System Information
  3. The Current Version tab at the bottom of this page provides a link to download the latest firmware
  4. Follow the appropriate Update Instructions from the table below
Current Firmware Revision Updated Firmware Revision Update Instructions


(Supports all FieldFox models)

  • Add support for ECal with option 020.
  • Fixed incorrect prompts and cal when user created kit specifies a connector whose equivalency to a "standard" connector cannot be established.
  • Add DNS setting in LAN configuration setup.
  • NOTE!!! Please backup all user state files before updating to firmware revision A.07.7x
  • Various bugs fixes. Please view firmware history changes from the below link.


Supports local time adjustment via internet update (A.07.5x)

Supports ECal on all models, except N9912A. ECal must be connected to FieldFox before performing calibration (A.07.26).

Supports option license file upgrade via external USB CD-ROM/DVD-ROM, (A.07.08).

Supports new firmware update via external USB CD-ROM/DVD-ROM. Requires mininum firmware revision A.07.05 or later.

*Implementation of time/date restriction setting on FieldFox. Please set local time correctly before updating from previous revision to A.07.xx.

Updating to / within A.07.xx

Updating firmware using external USB CD-ROM/DVD-ROM drive


Supports DataLink 4.12
Supports all FieldFox models

Updating to / within A.06.xx
A.04.xx or A.05.xx

Latest release (A.05.53*)
* Only for N9912A and N9923A.  See "Previous Version" tab to download

Updating within A.04.xx or A.05.xx
< A.04.00

A.04.02 (US/SG serial numbers)
A.04.03 (MY serial numbers)
Refer to "Supporting Documentation" below

Updating A.02.xx or A.03.xx

NOTE: Firmware upgrades do not affect the measurement accuracy of a FieldFox instrument. An annual calibration of a FieldFox remains valid following a firmware upgrade


To downgrade firmware:

Click here to view significant firmware history changes

Release Date Version Version Description
2015-01-27 A.07.78 Zip file containing firmware files

How to Download

  • Click the download button, select file, save and unzip.

How to Install

  • NOTE!!! Please backup all user state files to computer or USB flash drive before updating to firmware revision A.07.7x.
  • See A.07.xx firmware update supporting documentation for installation process.


  • Does Not Require a License

Supporting Documentation


Installs on:



  • ***Before updating to firmware revision A.07.xx, please MAKE SURE the time, date and time zone are set correctly. After installing this version, you will only be able to change your time once per day, and no more than 5 hours backwards.***

Supported Instruments

  • N9912A, N9923A, N9913A, N9914A, N9915A, N9916A, N9917A, N9918A, N9925A, N9926A, N9927A, N9928A, N9935A, N9936A, N9937A, N9938A