The Keysight (formerly Agilent/HP) 4294A is a precision impedance analyzer designed for efficient impedance measurement and analysis of components and circuits. It provides high basic impedance accuracy over a broad test-frequency range of 40 Hz to 110 MHz, making it highly effective for design, qualification, and quality control of electronic components. The instrument features a wide test signal range and internal DC bias capabilities, alongside advanced calibration and error compensation functions to eliminate fixture-related measurement errors.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB, LAN (10Base-T) |
| Display | 8.4-inch color LCD (TFT) |
| Warm-up Time | 30 minutes |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 90 to 132 V or 198 to 264 V AC, 47 to 63 Hz, 500 VA max |
| Operating Temperature | 0 to 40 °C |
| Dimensions (W×H×D) | 426 × 234 × 537 mm |
Frequency Characteristics
| Parameter | Value |
|---|---|
| Frequency Range | 40 Hz to 110 MHz |
| Frequency Resolution | 1 mHz |
| Sweep Parameters | Frequency, AC voltage, AC current, DC bias voltage, DC bias current |
| Number of Sweep Points | 2 to 801 points |
Measurement Parameters
| Parameter | Value |
|---|---|
| Measurement Parameters | |Z|, |Y|, θ, R, X, G, B, L, C, D, Q |
Measurement Accuracy and Range
| Parameter | Value |
|---|---|
| Impedance Measurement Range | 3 mΩ to 500 MΩ |
| Basic Impedance Accuracy | ±0.08% |
AC Test Signal
| Parameter | Value |
|---|---|
| Voltage Output Range | 5 mV to 1 Vrms |
| Current Output Range | 200 µA to 20 mArms |
DC Bias Signal
| Parameter | Value |
|---|---|
| Internal DC Bias Voltage Range | 0 V to ±40 V |
| Internal DC Bias Current Range | 0 mA to ±100 mA |
Signal Source
| Parameter | Value |
|---|---|
| Oscillator Level Resolution (Voltage) | 1 mV |
| Oscillator Level Resolution (Current) | 20 μA |
DC Bias
| Parameter | Value |
|---|---|
| DC Bias Voltage Resolution | 1 mV |
| DC Bias Current Resolution | 40 μA |
Control & Triggering
| Parameter | Value |
|---|---|
| Trigger Sources | Internal, External, Manual, Bus |
Calibration & Error Correction
| Parameter | Value |
|---|---|
| Calibration Functions | OPEN/SHORT/LOAD calibration, Port extension, Fixture compensation |
Analysis Functions
| Parameter | Value |
|---|---|
| Equivalent Circuit Analysis | 3- and 4-element models |
Performance
| Parameter | Value |
|---|---|
| Measurement Speed | Approx. 3 ms / point (Fast mode, ≥ 30 kHz) |
| Averaging Factor | 1 to 256 (integer) |
| Phase (θ) Measurement Range | -180° to +180° |
Power
| Parameter | Value |
|---|---|
| Maximum Power Consumption | 500 VA |
| Line Frequency | 47 Hz to 63 Hz |
Environmental
| Parameter | Value |
|---|---|
| Operating Humidity | 15% to 80% RH (non-condensing, wet bulb ≤ 29 °C) |
| Storage Temperature | -20 °C to +60 °C |
| Storage Humidity | 15% to 90% RH (non-condensing) |
| Operating Altitude | Up to 2,000 m |
Technology
Impedance Analysis
Applications
Electronic Component Testing, Material Evaluation, Circuit Design, Production Testing