The HP Keysight 4291A is a high-precision RF impedance and material analyzer designed for surface mount component evaluation and material testing. Operating across a broad frequency range of 1 MHz to 1.8 GHz, it provides highly accurate and repeatable impedance measurements from 0.1 ̩ to 50 k̩, featuring a built-in 7.5-inch color CRT display, equivalent circuit analysis, and optional DC bias capabilities.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (IEEE-488) supporting SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP0, DC1, DT1, C1, C2, C3, C4, C11, E2 |
| Display | 7.5-inch Color CRT, 512 x 400 resolution, 2 channels |
| Warm-Up Time | 30 minutes |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 90 V to 132 V / 198 V to 264 V, 47 Hz to 66 Hz, 500 VA max |
| Operating Temperature | 10 to 50 °C (Mainframe), 0 to 55 °C (Test Station) |
| Dimensions (W×H×D) | 426 mm × 234 mm × 537 mm (Mainframe), 275 mm × 95 mm × 205 mm (Test Station) |
| Weight | 24 kg (mainframe), 3.7 kg (test station) |
| Test Station Dimensions (W×H×D) | 275 mm × 95 mm × 205 mm |
| Test Station Weight | 3.7 kg |
| Test Station Cable Length | 1.5 m |
Measurement Capabilities & Parameters
| Parameter | Value |
|---|---|
| Impedance Measurement Parameters | |Z|, θz, |Y|, θy, R, X, G, B, Cp, Cs, Lp, Ls, Rp, Rs, D, Q, |Γ|, θγ, Γx, Γy |
| Impedance Measurement Range | 0.1 Ω to 50 kΩ |
| Connector Type | APC-7 |
Stimulus AC Signal Characteristics
| Parameter | Value |
|---|---|
| Frequency Range | 1 MHz to 1.8 GHz |
| Frequency Resolution | 1 mHz |
| AC Voltage Signal Level Range | 0.2 mVrms to 1 Vrms |
| AC Current Signal Level Range | 4 µArms to 20 mArms |
| AC Power Level Range | -67 dBm to 7 dBm |
DC Bias Source
| Parameter | Value |
|---|---|
| DC Bias Voltage Range (Option 001) | 0 to ±40 V |
| DC Bias Current Range (Option 001) | 20 µA to 100 mA, -20 µA to -100 mA |
| DC Bias Voltage Resolution (Option 001) | 1 mV |
| DC Bias Current Resolution (Option 001) | 20 µA |
Sweep & Measurement Speed
| Parameter | Value |
|---|---|
| Sweep Parameter Selection | Frequency, OSC level (voltage), DC bias voltage/current |
| Sweep Setup Modes | Start/Stop, Center/Span |
| Sweep Types | Linear, Log, List |
| Sweep Modes | Continuous, Single, Manual, Number of groups |
| Sweep Direction | Up sweep, Down sweep |
| Number of Sweep Points | 2 to 801 points |
| Averaging Types | Sweep average, Point average |
| Sweep Delay Functions | Point delay time, Sweep delay time |
Calibration & Compensation
| Parameter | Value |
|---|---|
| Calibration Functions | Open/Short/50 Ω calibration, Low loss calibration |
| Compensation Functions | Open/Short/Load compensation, Port extension, Electric length |
Display & User Interface
| Parameter | Value |
|---|---|
| Display Formats | Single, dual split, or overwrite; graphic or tabular |
| Trace Capacity | 1 trace/channel for measurement, 1 trace/channel for memory |
| Equivalent Circuit Simulation | Built-in component equivalent circuit analysis |
| Limit Line Testing | Supported (go/no-go testing) |
Interfaces & Connectivity
| Parameter | Value |
|---|---|
| External Reference Input | 10 MHz (typical), >-5 dBm (typical) |
| External Trigger Input | TTL level, pulse width >2 µs (typical) |
Storage & Memory
| Parameter | Value |
|---|---|
| Disk Storage | 1.4 MB flexible disk drive (DOS and LIF compatible) |
| Internal Memory | RAM disk memory |
Frequency
| Parameter | Value |
|---|---|
| Frequency Accuracy | ±20 ppm (at 23 °C ± 5 °C) |
| Frequency Reference Stability | ±10 ppm / year (standard); ±0.13 ppm / year (with Option 1D5) |
Signal Source
| Parameter | Value |
|---|---|
| Source Level Resolution | 0.1 dB |
Measurement Accuracy
| Parameter | Value |
|---|---|
| Basic Impedance Accuracy | ±0.8% |
Performance
| Parameter | Value |
|---|---|
| Measurement Time | 15 ms per point (typical) |
Storage
| Parameter | Value |
|---|---|
| Floppy Disk Drive Format | 3.5-inch, DOS (1.44 MB) and LIF formats |
Environmental
| Parameter | Value |
|---|---|
| Non-Operating Temperature Range | -40 °C to +70 °C |
| Operating Humidity | 15% to 95% RH |
| Operating Altitude | Up to 4,500 m |
Interfaces
| Parameter | Value |
|---|---|
| External Video Output | 15-pin D-sub (VGA) |
| Keyboard Port | Mini-DIN |
| I/O Port | 25-pin D-sub (8-bit I/O port) |
Measurement Setup
| Parameter | Value |
|---|---|
| Measurement Channels | 2 channels |
System & Control
| Parameter | Value |
|---|---|
| Programming Languages | SCPI, HP Instrument BASIC (IBASIC) |
Measurement Parameters
| Parameter | Value |
|---|---|
| Material Measurement Parameters (Option 002) | Complex permittivity (εr', εr''), Complex permeability (μr', μr''), loss tangent (tan δ) |
Technology
RF Impedance Analyzer
Applications
Surface mount component evaluation, dielectric/magnetic material testing