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FieldFox Analyzer Firmware Archive (N991xA, N992xA, N993xA FieldFox models)

FieldFox firmware revisions are listed by model below.



Release Date

Supported Models & Notes

A.08.17 Nov 22, 2016 No details on the version update at this time.
A.08.16  July 1, 2016

- SCPI command for FULL SCREEN

- QuickCal fails with 'ArgumentOutOfRangeException' using 1.5m cable and narrow span below 1MHz

- OBD: If active mode in user preset .sta file is no longer licensed, unit will fail to boot

- Differential measurement impedance format calculation incorrect

- can't enter IP addresses in LanConfig screen

- Increase the offset value limit in pulse measurement mode --- -80 dB is not big enough

- Customer cannot recall N9912A file

- Mouse usage causes limit line crash

- After resuming from suspend with battery saver OFF, bad data

- SRC unlock in USB power sensor mode when turning on source, N9912A

A.08.15 7 March 2016 - Support new options: 312 (Channel scanner) and 355 (Analog demodulation)
A.08.11 13 February, 2016 - Fixed: File Manager: Scrolling on empty list causes unit to freeze.
A.08.10 6 February, 2016

- Fixed: SCPI state file will fail siliently when non-system menu is in the menu history.
- Fixed: QuickCal fails with 'ArgumentOutOfRangeException' when using 1.5m cable and narrow span below 1MHz.

A.08.09 January 7, 2016 - Fixed: After recalling a state, the limit line editor will only display integers for the amplitude.
A.08.08 December 16, 2015

- Fixed: QSOLT produces "invalid connector ID" errors when using Type N connectors with the T calkit selected.
- Fixed crash when autoscaling.
- Fixed Radio standards dial (knob) issue in SA Mode.
- Bug fixed for ERTA Connection Wizard.

A.08.07 September 28, 2015 - Fixed zoom trace softkey update issues when in Pulse Measurements mode.
- Fixed crashes after repeated Normalization calibrations (known in N9913A).
A.08.06 August 21, 2015 - Supports Peak and Average power sensor model U2044XA
- Fixed TDR (ohm) file saving for .CSV and .S1P
A.08.05 August 13, 2015 - Dual TDR/DTF window in CAT mode.
- Various bugs fixes for ERTA and Option 330.
- Bug fixes in NA mode. Averaging reset did not happen after measurement changed.
- Bug fixes for Invalid Connector ID error during Enhanced Resopnse Cal with certain calibration kits.
A.08.04 May 29, 2015

- Support for U2043XA Wide Dynamic Range Average power sensor
- GPS dongle update due to obsolescence (N9912A and N9923A/AN Only).
- ERTA SCPI command update --> see programming guide.
- Option 330 bug fixes.

Other bugs fixes:
- Marker BW Q setting is lost when changing between the 2 Big Marker states (A & B).
- IP address allows entry of non-IP-address-compliant characters.
- Trigger level not following display change when external gain compensation applied.
- Setting GPSCoordinateDisplayFormat to None in preferences will cause unit to not start.
- Instruction text for Port 1 and Port 2 is backwards for isolation cal.
- N9912A QuickCal - Cable loss failure with measuring load step fails to report error and exit cal wizard.

A.08.01 March 17, 2015 - Fixes SWR resolution for Scale and Reference rounding.
A.08.00 February 1, 2015 - NEW! Add supports for TDR (Option 215) and ERTA, (Option 209). Requires firmware A.08.00 and above.
A.07.78 January 27, 2015 - 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.
A.07.76 December 13, 2014

- Add SCPI command for Local-Remote keyboard utility
- Marker target search enhancement
- Fix bug when captures from Data Link on missing number of averages in CAT/NA mode, and smoothing indicator in NA mode.

A.07.75 November 4, 2014 - Add Big Readout for marker functions.
- New Keysight start-up screen.
A.07.57 October 9, 2014

- Enabled 7-16 connector type Ecal module for calibration use.
- Fix bug on SCPI command for normalization (THRU 1,2).

A.07.55 September 22, 2014

- NA mode: Marker commands will crash when marker x value is too close to the end of the frequency span, and when also a marker search is performed.
- NA mode: Enable SCPI command for target search on specific direction (right or left direction search). Previously was set as looping only.

A.07.54 August 29, 2014

- Fix bug where VVM return zero value when recalling two different states.
- Fix bug where GPS display preferences is not active after unit reboot.
- Fix crash when spectrogram time marker is set more than 450.
- Fix bug on SA mode when signal is not at the correct amplitude after resuming from suspend.
- Japanese language translation updates in FieldFox

A.07.52 August 5, 2014 - Fix crash in pulse profiler.
- Fix wrong marker result when Parameter Conversion is selected.
A.07.51 June 12, 2014 - Fix bug where status bar progress percentage would sometimes return to 0% during instrument initialization.
- Fix USB Power Meter crash related to use of the “escape” key.
- Fix function “copy all files to USB” and “saving cable corrections or cable files to USB” error
- Fix crash related to specific ECal units that included commas in the model number.
- Fixed state saving to include missing marker tracking information.
A.07.50 May 14, 2014

- Support option 208, Frequency Offset with USB Power Sensor (FOPS)
- Support option 212, 1-Port mixed-mode S-parameters
- Add Velocity factor for CAT mode DTF waveguide measurements 
- Add Impedance Z and admittance Y parameter conversion
- Add 1-port response calibration w/isolation 
- Add memory trace for Pulse Measurements
- Add print to PCL USB printers
- Add Update time via internet
- Add SCPI support for CPM
- Add Portuguese language
- Fixed: Simple ECal ON ignored for type N ECal
- Fixed: Interference Rejection levels Minimum and Medium appear to be completely broken
- Fixed: Initialization hang if unit is talked to over LAN "too early" in the boot process

A.07.32 April 11, 2014

- Fixed: N9912 Normalization Cal issue.
- Fixed: N9912 Quick Cal issue with long cable
- Fixed: All models intermittently hang during startup when communicating over LAN

A.07.29 February, 21, 2014

- Enhancements to response cal, both short response and normalization.
- .csv data saved in same format as display
- ECal and preset issues resolved

A.07.27 November 19, 2013 - Bug fixes on time zone automatically update to Pacific time after firmware update.
A.07.26 November 11, 2013

- Supports option 330, Pulse Measurements.
- Supports ECal on all models, except N9912A. ECal must be connected to FieldFox before performing calibration.

A.07.08 October 30, 2013

- Add support to install option licenses via external USB CD-ROM/DVD-ROM
- Add support to update new firmware revision via external USB CD-ROM/DVD-ROM

A.07.06 September 24, 2013

- Supports U8485A power sensor
- Fixed crash when using knob in "edit preferences" screen
- Fixed crash when switching from trace#1 to trace #2 with Smith Chart and Scaling.

A.07.05 August 30, 2013

- Enable "set time forward" with only one change per day.
- Fixed "checking for 430 upgrade" line.

A.07.02 August 14, 2013 - Fix power supply dither pattern.
A.07.01 July 29, 2013

- Supports remote control viewing on iOS devices and other bug fixes. Required Option 030 to control FieldFox remotely via iOS devices.

- Supports Spectrum Analyzer Time Gating capability, required Option 238. See configuration guide for ordering info.

- Various bugs fixes. Please refer to firmware release notes for more info.

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

A.06.24 June 28, 2013 - Fixed bug that causes some units to shut off during battery only mode after updating to firmware A.06.23.
A.06.23 April 25, 2013

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

- Various bugs fixes. Please refer to firmware release notes for more info.

A.06.18 March 6, 2013

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

- Fixed bug when inserting slow USB flash drive that will show error message "Please Reboot. Expected hardware not present"

A.06.17 February 19, 2013

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

- Add Turkish and Russian language support.
- Compatible with DataLink version 4.12

A.06.08 November 19, 2012

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

A.05.53 December 20, 2011 N9912A, N9923A
A.05.52 November 16, 2011 N9912A, N9923A
A.05.50 September 8, 2011

N9912A, N9923A.

- Compatible with DataLink version 3.60 and above.

A.05.37 July 27, 2011 N9912A, N9923A
A.05.36 May 19, 2011 N9912A, N9923A
A.05.34 April 6, 2011 N9912A, N9923A
A.05.33 February 16, 2011 N9912A, N9923A
A.05.32 December 15, 2010 N9912A, N9923A
A.05.31 November 11, 2010 N9912A, N9923A
A.05.30 November 2, 2010 N9912A, N9923A
A.05.18 September 15, 2010 N9912A, N9923A
A.05.17 August 20, 2010 N9912A, N9923A
A.05.16 August 6, 2010 N9912A, N9923A
A.05.15 July 13, 2010 N9912A, N9923A
A.05.04 June 4, 2010 N9923A
A.05.01 March 11, 2010 N9923A


Version Release Date Supported Models & Notes
A.04.54   March 19, 2010       N9912A
A.04.53 February 4, 2010   N9912A 
A.04.51 January 8, 2010  N9912A 
A.04.50 November 25, 2009 N9912A

September 18, 2009 


September 1, 2009



Zip file containing firmware files for MY serial numbers ONLY

A.04.02 September 1, 2009 


Zip file containing Firmware files for US/SG serial numbers ONLY 

A.04.01 August 17, 2009  N9912A 
A.04.00 July 24, 2009   Not Available 
A.03.06 April 2, 2009  N9912A 
A.03.02 February 6, 2009  N9912A 
A.02.08 December 8, 2008 N9912A 
A.02.05 November 1, 2008 N9912A 


Release Date Version Version Description
2016-11-22 A.08.17 New Firmware for the OLD CPU

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/A.08.xx.
  • Some earlier units (typically N9912A and N9923A) may run out of internal storage space to unpack the firmware. Please delete all internal user saved files and then proceed with the update.
  • See A.07.xx/A.08.xx firmware update supporting documentation for installation process.


  • Does Not Require a License

Supporting Documentation


Installs on:



  • No Prerequisites Needed

Supported Instruments

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