Keysight (Agilent) E4991B

| Attribute | Value |
|---|---|
| Frequency Range | 1 MHz to 3 GHz |
| Impedance Measurement Range | 1 mΩ to 100 MΩ |
| Basic Impedance Accuracy | ±0.08% |
| Test Signal Level (Voltage) | 4 mV rms to 1 V rms (into 50 Ω load) |
| Test Signal Level (Current) | 200 µA rms to 20 mA rms |
| DC Bias Voltage | 0 V to ±40 V (internal), up to ±400 V (external) |
| DC Bias Current | 0 mA to ±100 mA (internal) |
| Measurement Parameters | |Z|, |Y|, θ, R, X, G, B, Cs, Cp, Ls, Lp, Rs, Rp, D, Q, Γ, and more |
| Interface/Connectivity | LAN (LXI Core), USB, GPIB |
| Display | 10.4-inch color LCD touch screen |
Keysight (Agilent) E4991B Options:
- E4991B - 050 - Frequency range 1 MHz to 500 MHz
- E4991B - 100 - Frequency range 1 MHz to 1 GHz
- E4991B - 300 - Frequency range 1 MHz to 3 GHz
- E4991B - 001 - DC Bias (DC voltage bias and DC current bias)
- E4991B - 002 - Material measurement (permittivity and permeability parameters)
- E4991B - 007 - Temperature Characteristic Test Kit
- E4991B - 010 - Alternative test head (compact test head)
- E4991B - 1E5 - High stability frequency reference (±1 ppm, 5°C to 40°C)
| Model | E4991B |
|---|
The Keysight (Agilent) E4991B Impedance Analyzer offers precise impedance analysis across three frequency ranges (1 MHz–500 MHz, 1 GHz, 3 GHz) with ±0.65% basic accuracy and impedance range of 120 mΩ to 52 kΩ. It features a large 10.4-inch color touchscreen, built-in DC bias (0–±40 V, 0–±100 mA), and supports detailed data analysis, including equivalent circuit analysis and limit line testing.
Supporting advanced options like dielectric/magnetic material measurement (Option 002), temperature characteristics analysis (Option 007), and wafer-level testing (Option 010), it simplifies complex R&D and QA workflows. Compatible with N1500A-005 for material evaluation.
Testwall can supply the used Keysight (Agilent) E4991B, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Keysight (Agilent) E4991B.





