U848X Series USB Power Sensors Firmware Revision History

Additions/Changes for Version A.02.06 . . . (compiled  Jun 2026)

  • Improved Sensor Startup Behavior.
  • Secure Erase Enhancement.
  • Fixed an issue where readings could remain unchanged when using external trigger signals with INIT:CONT ON, ensuring accurate and updated measurement results

Additions/Changes for Version A.02.05 . . . (compiled  Jul 22, 2019)

  • Resolve default manufacturer spelling error during query and setting wrong manufacturer when empty string is used for of SYST:PERS:MAN:DEF.

Additions/Changes for Version A.02.02 . . . (compiled  Nov 18, 2016)

  • Fix sensor timeout during power calibration in PNAX

Additions/Changes for Version A.02.01 . . . (compiled  Sep 28, 2016)

  • Improvement on auto internal calibration feature which fast mode measurement.

Additions/Changes for Version A.02.00 . . . (compiled  Dec 18, 2015)

  • Released a rebranded firmware in such the default manufacturer is changed from "Agilent Technologies" to "Keysight Technologies". With the firmware change, there are newly introduced SCPI commands. Please refer to the Programming Guide (http://literature.cdn.keysight.com/litweb/pdf/U8481-90003.pdf?id=2280436) for details.

Additions/Changes for Version A.01.09 . . . (compiled  Jul 31, 2015)

  • Resolve firmware bugs on recovery feature

Additions/Changes for Version A.01.08 . . . (compiled  Mac 02, 2015)

  • Added a reconvery feature to sensor's calibration data

Additions/Changes for Version A.01.06 . . . (compiled  Feb 14, 2014)

  • Support real time dynamic measurement uncertainty display *
  • Support Gamma & S-parameter correction *
  • SPEED for FAST mode improved to 1ms
  • Cal operation duration reduction
  • Incompatibile with N1913A/14A Power Meter

*These features applicable to:

 1. All U8481A, U8485A, U8487A and U8488A power sensors. 

 2. These features will still apply to U8481A & U8485A USB power sensors calibrated before December 31, 2013, however, users may observe less improvement because default values are used for certain parameters.  

Version A.01.01  (compiled  Jan 21, 2013)

  • Initial release.
  • Provide compatibility with N1913A/14A Power Meter