The Rohde & Schwarz URE3 is a high-performance broadband RMS and peak voltmeter designed for high-precision AC and DC measurements up to 30 MHz. Featuring a patented rectifier circuit with microprocessor-controlled autocalibration, the URE3 delivers exceptional measurement accuracy across a wide dynamic range. With features like automatic frequency response correction, selectable high-pass and low-pass filters, and an optional comprehensive digital/analog I/O expansion, the URE3 is optimized for demanding lab and automated test system (ATE) applications.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (IEEE-488) standard; optional: ready output, trigger input, TTL frequency counter input, dual-channel analog output (via In/Out option) |
| Display | 4.5-digit LCD with selectable scale analog bar graph |
| Setup Memory | 9 complete instrument configurations |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 V / 120 V / 220 V / 240 V (±10%), 47 Hz to 440 Hz |
| Operating Temperature | 0 to 50 |
| Dimensions (W×H×D) | 219 × 103 × 350 |
| Weight | 4.6 |
Voltage Measurement Specifications
| Parameter | Value |
|---|---|
| AC Voltage Measurement Range | 50 µV to 300 V |
| DC Voltage Measurement Range | 0 to 300 V |
| Frequency Range | DC, 10 Hz to 30 MHz |
| Frequency Measurement Range | Up to 30 MHz |
| Crest Factor Range | Up to 7 (at full scale) |
| Measurement Resolution | 4.5 digits |
| True RMS Converter Type | Patented rectifier circuit with microprocessor-controlled autocalibration |
| AC+DC Coupling Capability | Yes (True RMS AC+DC weighting) |
| Automatic Frequency Response Correction | Supported (utilizes measured frequency internally to enhance accuracy at high frequencies) |
| Zero Function | Supported (compensates for inherent noise and external noise voltages) |
Input Characteristics
| Parameter | Value |
|---|---|
| Input Impedance | 1 MΩ |
| Input Coupling Modes | AC, DC, AC+DC |
Measurement Speed and Dynamics
| Parameter | Value |
|---|---|
| Maximum Reading Rate | 30 measurements/s |
Signal Conditioning and Filters
| Parameter | Value |
|---|---|
| Low-Pass Filter | Supported |
Display and Math Functions
| Parameter | Value |
|---|---|
| Relative Measurement Mode | Supported |
| Peak-Value Measurement Modes | Positive peak, negative peak, peak-to-peak |
| Statistical Functions | Minima / Maxima logging |
| Probe Division Factor Correction | Supported (allows scaling display results for external passive/active probes) |
Inputs and Outputs (I/O)
| Parameter | Value |
|---|---|
| Dual-Channel Analog Output | Supported (option-dependent via In/Out interface option) |
| Ready Output | Supported (option-dependent via In/Out interface option) |
| External Trigger Input | Supported (option-dependent via In/Out interface option) |
| TTL Frequency Counter Input | Supported (option-dependent via In/Out interface option) |
Input
| Parameter | Value |
|---|---|
| Maximum Input Voltage | 300 V (RMS), 425 V (peak) |
| Input Capacitance | 20 pF |
Performance
| Parameter | Value |
|---|---|
| Basic DC Accuracy | ±(0.02% of reading + 0.01% of full scale) |
| Basic AC Accuracy | ±(0.05% of reading + 0.02% of range) at 1 kHz |
Options
| Parameter | Value |
|---|---|
| Rear Panel Connector Option | Option URE3-B1 (relocates front-panel inputs and outputs to the rear) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +70 °C |
Power Details
| Parameter | Value |
|---|---|
| Power Consumption | Approx. 30 VA |
| Line Frequency Range | 47 Hz to 440 Hz |
Display & Controls
| Parameter | Value |
|---|---|
| Display Resolution | 320 × 240 pixels |
Technology
Patented rectifier with microprocessor-controlled autocalibration
Applications
Broadband voltage measurement, peak detection, and frequency measurement in RF, analog audio, and power electronics calibration.