U2000 Series USB Power SEnsors Firmware Revision History
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Release A1.04.01 (15 Mar 2017)
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- Fixed a defect for *TST? self-test intermittent failure in temperature sensor configuration
- Bug fixed: After power up, calibration auto will stay ON after "CAL:ZERO:TYPE INT"

Release A1.04.00 (15-Apr-2016)
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- 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.
  - SYST:PERS:MAN
  - SYST:PERS:MAN:DEF
  Refer to the programming guides for more details (http://literature.cdn.keysight.com/litweb/pdf/U2000-90411.pdf?id=1239288)
- Fixed a defect such that following a system preset (SYST:PRES), the average count will now updated immediately according to the auto-averaging setting
- Fixed measurement (MEAS?) timeout and hang issues when power sensor upper range(POW:AC:RANG 1) is selected to measure lower range power

Release A1.03.07 (10-Oct-2015)
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- Fixed U2002A external triggering power sweep

Release A1.03.06 (10-Aug-2015)
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- Fixed source code compilation problem
- Fixed average count not updated after SYST:PRES follow by INIT:CONT OFF (or *RST)
 
Release A1.03.05 (26-June-2012)
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- Fixed a measurement stability issue when measuring GSM signal in external triggering. 

Release A1.03.04 (19-June-2012)
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- Support U2001A-H25 special option power sensor
- Fixed timeout error during *ESR? looping.
- Fixed 900ms temperature compensation delay of CW measurement which occurs every 10-15s.


Release A1.03.01 (25-May-2010)
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Added the following new features/enhancements
- Pulse measurements in AVERAGE mode
  - Pulse Width > 30us 
  - Pulse Period < 8ms 
  - Minimum 1% Duty Cycle 
  - New SCPI ?SYST:PRES BURST
- Time gated (aka NORMAL mode) measurement enhancements, applicable to all models except U2004A 
  - Internal Trigger
  - Signal trace acquisition 
  - Single shot trigger
  - Measure down to -30 dBm. Previously until -25 dBm
- Intermittent USB lockup in gated mode fixed.

Note: It is advisable to perform external zeroing on the U2000 Series power sensor for power 
measurement level below -30 dBm.


Release A1.02.01 (23-April-2009)
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- Fix intermittent time-gated measurement drop out


Release A1.02.00 (12-November-2008)
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The following new features are supported
- Time-gated measurement (U2004A model is NOT supported)
- Frequency dependant offset table.
- Support U2000B,U2001B, U2000H, U2001H, U2002H models


Release Release A1.01.03 (8-April-2008)
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- Channel offset fix
- AUto zero not completed when cold start industrial PC fix
- External trigger slope inversion fix 


Release A1.01.02 (27-November-2007)
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Enhanced feature
- Enabled iDEN signal measurements


Release A1.01.01 (2-July-2007)
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Initial release.