Keysight 4294A Precision Impedance Analyzer

4294A Precision Impedance Analyzer
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The 4294A precision impedance analyzer is an integrated solution for efficient impedance measurement and analysis of components and circuits. The 4294A covers a broad test-frequency range (40 Hz to 110 MHz) with basic impedance accuracy:+/-0.08 %. Excellent High Q/Low D accuracy enables analysis of low-loss components. The wide signal-level ranges enable device evaluation under actual operating conditions. The test signal level range is 5m V to 1 Vrms or 200 uA to 20m Arms, and the DC bias range is 0 V to +/-40 V or 0m A to +/-100m A. Advanced calibration and error compensation functions eliminate measurement error factors when performing measurements on in-fixture device.

The 4294A is a powerful tool for design, qualification and quality control, and production testing of electronic components. Circuit designers and developers can also benefit from the performance/functionality offered.



  • Accurate measurement over wide impedance range and wide frequency range
  • Basic impedance accuracy: +/- 0.08 %
  • 40 Hz to 110 MHz, 3 m ohms 500M ohms
  • Powerful impedance analysis function
  • Ease of use and versatile PC connectivity



Range 40 Hz to 110 MHz
Resolution 1 mHz
Accuracy without Option 4294A-1D5: ±20 ppm (at 23 ±5 °C) ±40 ppm (at 0 to 55 °C)
with Option 4294A-1D5: ±0.13 ppm (at 0 to 55 °C)
Voltage Signal Level
Range 5 mVrms to 1 Vrms
Resolution 1 mV
Accuracy at 4-terminal pair port of the 4294A or 7-mm port of the 42942A: ±[(10 + 0.05 f)% + 1 mV] (at 23 ±5 °C)
at measurement port of the 42941A, 16048G/H: ±[(15 + 0.1 f)% + 1 mV] (at 23 ±5 °C)