Keysight 42xx

Models in this family

1. 

   4261 A LCR Meter

   The Keysight / Agilent 4261A LCR Meter is a general-purpose, high-reliability component test instrument for measuring impedance-element parameters.

   Cited variants

   Designation	Generation	Vintage	Changes	Source
   4261 A	—	—	Option 002 is listed for this model.	Equipment inventory listing[1]
   4261 A LCR Meter - Option 002	—	—	—	Equipment inventory listing[1]

2. 

   4280 A C Meter C V Plotter

   The Keysight 4280 A C Meter C V Plotter is an electronic instrument identified by model 4280 A.

   Cited variants

   Designation	Generation	Vintage	Changes	Source
   Option 001	—	—	—	Equipment inventory listing[2]

3. 

   4284 A Precision LCR Meter

   The Keysight / Agilent 4284A Precision LCR Meter is a precision LCR meter with a 20 Hz to 1 MHz test frequency range.

   Cited variants

   Designation	Generation	Vintage	Changes	Source
   4284A 001	—	—	Adds Power Amplifier/Internal DC Bias option.	bellnw.com[3]
   4284A 001 002	—	—	Adds Power Amplifier/Internal DC Bias and Bias Current Interface options.	bellnw.com[3]
   4284A 006	—	—	Adds 2 m/4 m Cable Length Operation.	bellnw.com[3]
   4284A 001 006	—	—	Adds Internal Power Amplifier/DC Bias and 2 m/4 m Cable Length Operation.	bellnw.com[3]

4. 4294 A Impedance Analyzer

   The Keysight 4294 A Impedance Analyzer is a precision impedance analyzer with a 40 Hz to 110 MHz frequency range.

   Cited variants

   Designation	Generation	Vintage	Changes	Source
   4294A-1D5	—	—	High-stability frequency reference option.	assets.testequity.com[4]

Sources