HP / Agilent 4194A Impedance/Gain-Phase Analyzer

The HP/Agilent 4194A Impedance/Gain-Phase Analyzer measures impedance, gain, and phase across a broad frequency spectrum from 100 Hz to 40 MHz using its internal bridge, or 10 kHz to 100 MHz with the optional 41941A/B Impedance Probe Kit. This instrument delivers impedance accuracy of 0.17% (internal bridge) or 1.5% (with probe kit) across a measurement range of 10 mΩ to 100 MΩ. Gain-phase measurements span 10 Hz to 100 MHz with amplitude resolution to 0.1 dB. The analyzer executes measurements in approximately 3.7–4.5 ms per point at frequencies ≥30 kHz, enabling rapid characterization in R&D, manufacturing, and quality control environments.

Technical Specifications Impedance Measurement

Frequency range: 100 Hz to 40 MHz (internal bridge); 10 kHz to 100 MHz (with 41941A/B probe kit)

Measurement range: 10 mΩ to 100 MΩ (internal); 0.1 Ω to 1 MΩ (with probe kit)

Accuracy: 0.17% (internal); 1.5% (probe kit)

Resolution: 0.1 mΩ; 1.5–3% across 100 mΩ to 1 MΩ range Gain-Phase Measurement

Frequency range: 10 Hz to 100 MHz

Amplitude range: −107 dBm to +15 dBm

Resolution: 0.1 dB Measurement Speed: 3.7–4.5 ms per point (≥30 kHz) Test Signal: 10 mV to 0.5 mV rms at ≥10 MHz DC Bias

Internal source: ±40 V

External source: Up to ±150 V / 0.5 A; 500 mA current capability

Key Features

7.5-inch color CRT display with graphical analysis

Equivalent circuit analysis (approximate and simulate modes)

Secondary parameter derivation and marker/cursor functions

Auto Sequence Programming (ASP) for autonomous measurement control without external computer

HP-IB (IEEE-488) remote programming

High-accuracy calibration with error elimination for residual impedance and stray admittance

Optional 19-inch rack mount kit (Option 909)

Typical Applications Component and circuit impedance characterization, gain-phase analysis across extended frequency ranges, DC bias-dependent measurements, and automated test sequences in production environments.

Compatibility & Integration Fully compatible with HP 41941A (1.5 m cable) and HP 41941B (3 m cable) Impedance Probe Kits for extended measurement capability. HP-IB interface enables integration with automated test systems.