Agilent/Keysight 4084A

The Agilent/Keysight 4084A is a precision impedance analyzer engineered for accurate characterization of electronic components, materials, and circuits across frequencies from 40 Hz to 110 MHz. Operating in a four-terminal pair configuration, it delivers comprehensive measurement capabilities across 20 distinct parameter formats, making it essential for component validation, materials research, and production quality assurance.

– Technical Specifications

Measurement Parameters
The 4084A quantifies impedance in multiple representations: |Z|-θ and |Y|-θ (magnitude and phase), R-X (resistance and reactance), series and parallel inductance configurations (Ls-Rs, Ls-Q, Lp-G, Lp-Q, Lp-Rp), series and parallel capacitance configurations (Cs-Rs, Cs-Q, Cs-D, Cp-G, Cp-Q, Cp-D, Cp-Rp), G-B (conductance and susceptance), and complex Z-Y. Derived parameters include |Z|-Ls, |Z|-Cs, |Z|-Lp, |Z|-Cp, |Z|-Rs, |Z|-Q, and |Z|-D.

Frequency & Resolution
Frequency range spans 40 Hz to 110 MHz with 1 mHz resolution.

Signal Source
Voltage test signal: 5 mVrms to 1 Vrms (1 mV resolution). Current test signal: 200 µArms to 20 mArms (20 µA resolution). Test signal level sweeping evaluates voltage and current dependency.

DC Bias
DC voltage bias: 0 V to ±40 V (1 mV resolution). DC current bias: 0 mA to ±100 mA (40 µA resolution). Auto Level Control (ALC) feedback maintains precise bias throughout sweeps, enabling C-V characterization. Bias sweeping supports dependency evaluation across the full range.

– Key Features

• Four-terminal pair configuration with BNC female connectors for high-accuracy measurements
• Signal level dependency evaluation via voltage and current sweeps
• DC bias dependency analysis with automatic level control feedback
• Single-port measurement capability via optional 42942A Terminal Adapter (7 mm) or 42941A Impedance Probe (3.5 mm)

– Typical Applications

• Component characterization in R&D environments
• Varactor diode C-V characterization with DC bias sweep capability
• Manufacturing quality control and production testing
• Material impedance profiling across wide frequency span

– Compatibility & Integration

The standard four-terminal pair port accepts BNC female connectors. Optional adapters convert to single-port terminal configurations for alternative measurement geometries.