The Keysight (Agilent/HP) 4291B is a high-precision RF Impedance and Material Analyzer operating from 1 MHz to 1.8 GHz. It provides an all-in-one solution for evaluating surface-mount components, electronic materials, and magnetic or dielectric substances. Featuring a basic impedance accuracy of ±0.8% and dedicated material measurement capabilities up to 1 GHz, the 4291B utilizes an external test station connected by an error-less 1.8-meter cable to maintain accuracy at the point of measurement.
Specifications
Measurement Parameters and Range
| Parameter | Value |
|---|---|
| Measurement Parameters | |Z|, θz, |Y|, θy, R, X, G, B, Cp, Cs, Lp, Ls, Rp, Rs, D, Q, |Γ|, θγ, Γx, Γy |
| Basic Impedance Accuracy | ±0.8% |
| Equivalent Circuit Models | 5 models (with automatic circuit constant calculation) |
| Material Evaluation Frequency Range | 1 MHz to 1 GHz |
Stimulus (Source) Characteristics
| Parameter | Value |
|---|---|
| Frequency Range | 1 MHz to 1.8 GHz |
| Frequency Resolution | 1 mHz |
| Internal DC Bias Voltage Range | Up to 40 V (with option) |
Sweep Capabilities
| Parameter | Value |
|---|---|
| Measurement Channels | 2 channels with independent parameter selection |
Data Storage and Operating System
| Parameter | Value |
|---|---|
| Internal Programming Language | Instrument BASIC (IBASIC) |
| Storage Drive | Built-in 3.5-inch floppy disk drive |
Supported Accessories and Options
| Parameter | Value |
|---|---|
| Supported Component Test Fixtures | 4 dedicated fixtures (supports DUT sizes from 0.5 mm to 20 mm) |
| Material Fixture Temperature Range | -55 °C to +200 °C |
Measurement Performance
| Parameter | Value |
|---|---|
| Measurement Range (|Z|) | 0.1 Ω to 50 kΩ |
| Averaging Factor | 1 to 999 |
Source Characteristics
| Parameter | Value |
|---|---|
| OSC Level Voltage Range | 0.2 mV to 1 V rms |
| OSC Level Current Range | 4 µA to 20 mA rms |
| Internal Reference Frequency | 10 MHz |
Sweep Characteristics
| Parameter | Value |
|---|---|
| Number of Measurement Points | 2 to 801 |
| Sweep Types | Linear, Log, List |
Test Station
| Parameter | Value |
|---|---|
| Test Station Connector Type | APC-7 (7 mm) |
Technology
RF Impedance & Material Analysis
Applications
High-accuracy evaluation of surface-mount components, dielectric materials, and magnetic materials