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.
