The HP 4191A is an RF Impedance Analyzer designed by Hewlett-Packard (later Agilent/Keysight) for fully automatic, high-performance measurement of impedance parameters of electronic devices and materials. Operating from MF to the UHF region, it features a built-in frequency synthesizer, dual-mode digital sweep operations, and an integrated DC bias source.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (IEEE-488) |
| Display | Dual 4.5-digit digital displays |
| Warm-up Time | 30 minutes |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100, 120, 220 V ±10%, 240 V +5%/-10%, 48 to 66 Hz, ≤150 VA |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 425.5 mm × 235 mm × 574 mm |
| Weight | approx. 24 kg |
Stimulus AC Signal Characteristics
| Parameter | Value |
|---|---|
| Frequency Range | 1 MHz to 1000 MHz |
| Frequency Resolution | 100 kHz to 200 kHz (100 Hz to 200 Hz optional) |
| Frequency Accuracy | ±15 ppm |
| Test Signal Source | Built-in synthesizer |
Measurement Capabilities & Parameters
| Parameter | Value |
|---|---|
| Primary Measurement Parameters | Resistance (R), Reactance (X), Conductance (G), Susceptance (B), Inductance (L), Capacitance (C), Impedance (|Z|), Admittance (|Y|) |
| Secondary Measurement Parameters | Dissipation factor (D), Quality factor (Q), Phase angle, Reflection parameters |
| Impedance Measurement Range (|Z|, R) | 1.0000 Ω to 99.999 kΩ |
| Reactance Measurement Range (X) | 1.0000 Ω to 99.999 kΩ |
| Admittance Measurement Range (|Y|) | 10.000 µS to 999.99 mS |
| Conductance Measurement Range (G) | 10.000 µS to 999.99 mS |
| Inductance Measurement Range (L) | 0.1000 nH to 99.999 mH |
| Capacitance Measurement Range (C) | 0.1000 pF to 99.999 µF |
DC Bias Source
| Parameter | Value |
|---|---|
| Internal DC Bias Voltage Range | Up to ±40 V |
| DC Bias Sweep Capability | Swept voltage bias supported |
Sweep & Measurement Speed
| Parameter | Value |
|---|---|
| Sweep Types | Linear, Logarithmic |
Display & User Interface
| Parameter | Value |
|---|---|
| Measurement Display Resolution | 4.5 digits (simultaneous readout of two parameters) |
| Frequency Control | Front panel keyboard controlled |
Calibration & Compensation
| Parameter | Value |
|---|---|
| Calibration Functions | Automatic calibration |
| Self-Test Capability | Integrated self-test diagnostic mode |
| Electrical Length Compensation Range | 0 to 99.9 cm |
Measurement Speed
| Parameter | Value |
|---|---|
| Measurement Time | 150 ms (Normal mode), 45 ms (High-speed mode) |
Test Signal Source
| Parameter | Value |
|---|---|
| Test Signal Level Range | -2 dBm to -15 dBm (continuously variable) |
Measurement Control
| Parameter | Value |
|---|---|
| Trigger Modes | Internal, External, Manual |
Measurement Performance
| Parameter | Value |
|---|---|
| Reference Impedance | 50 Ω |
Inputs & Outputs
| Parameter | Value |
|---|---|
| Recorder Output | 0 to 1 V (for X, Y1, Y2 analog outputs) |
Hardware Options & Connectivity
| Parameter | Value |
|---|---|
| Test Port Connector | APC-7 |
DC Bias
| Parameter | Value |
|---|---|
| DC Bias Voltage Resolution | 10 mV (0 to ±9.99 V), 100 mV (±10.0 to ±40.0 V) |
| DC Bias Voltage Accuracy | ±(0.12% of setting + 15 mV) |
Measurement Modes
| Parameter | Value |
|---|---|
| Deviation Measurement Modes | Delta, Delta percent (Δ, Δ%) |
Technology
RF Impedance Analysis
Applications
Electronic device and material impedance measurement