Silicon Investigations HP (Agilent, Keysight) 4194A Impedance/Gain Phase Analyzer Repair Service

The HP (Agilent, Keysight) 4194A impedance/gain phase analyzer is an integrated solution for the efficient measurement and analysis of components and circuits.  The test frequency range is 100Hz to 40Mhz for impedance measurements and 10Hz to 100Mhz for gain phase measurements.  Silicon Investigations repairs these analyzers and we stock most common assemblies.  In addition, we purchase non working machines and sell refurbished analyzers.  Current prices for used machines range from $5000 to $8500, depending on options and cosmetic condition.  Please contact us for more information.

The HP (Agilent, Keysight) 4194A analyzers are known to have problems with the power supplies, null detector subassembly, IF amp assembly, front panel buttons, and display system.  Replacement assemblies can usually be delivered from stock.  Please contact us with your requirements.

CAUTION: if your machine is not functioning correctly and the screen is blank and the led lights on the front panel are unresponsive or blink randomly - turn the machine off immediately.  We have recently seen a failure where the processor is running randomly causing further damage to the machine.

Opt 350     50 ohm system
Opt 375     75 ohm system
Opt 001     High stability frequency reference

HP (Agilent, Keysight)  4194A Analyzer Reference Material:
HP 4194A Specifications
HP 4194A Operation Manual
HP 4194A service Manual

HP (Agilent, Keysight)  4194A Test Fixtures:
HP 16047A Operation and Service Manual
HP 16047D Operation and Service Manual
HP Impedance Test Fixture Guide

HP (Agilent, Keysight) Standard Capacitors:
HP 16380A Standard Capacitor Set
HP 16380C Standard Capacitor Set

HP (Agilent, Keysight) Calibration R-L Standard:
HP 16074A R-L Calibration Standard

HP Application Notes:
Impedance Characterization of Resonators Using the 4194A Impedance / Gain-Phase Analyzer
Multi-Frequency C-V Measurements and Doping Profile Analysis of Semiconductors - HP 4194A Application Information
Constant Current Measurements Using the HP 4194A - HP 4194A Impedance / Gain-Phase Analyzer

Please see our shipping information page for packing and shipping of your valuable instrument: Shipping Cautions

Please call us at 920-955-3693 or email [email protected] 


Last Modified May 29, 2020
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