The Rohde & Schwarz URE2 is a high-accuracy, broadband RMS voltmeter designed for speed and precision across a wide frequency range. Utilizing a patented rectifier circuit, the URE2 achieves true RMS measurement for both AC and AC+DC signals with a crest factor up to 7 and frequencies scaling up to 25 MHz.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (IEEE-488) |
| Display | 4.5-digit digital LCD and analog display with selectable scale |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 V / 120 V / 220 V / 240 V (±10%), 47 Hz to 440 Hz, 30 VA |
| Operating Temperature | 0 °C to +50 °C |
| Dimensions (W×H×D) | 219 mm × 103 mm × 350 mm |
| Weight | 4.8 kg |
Voltage Measurement Specifications
| Parameter | Value |
|---|---|
| AC Voltage Measurement Range | 50 µV to 300 V |
| Frequency Range | DC, 10 Hz to 25 MHz |
| Crest Factor Range | Up to 7 |
| Measurement Resolution | 4.5 digits |
| True RMS Converter Type | Patented rectifier circuit |
| AC+DC Coupling Capability | Yes |
| Autocalibration | Microprocessor-controlled autocalibration with nonvolatile storage of correction factors |
| Zero Function | Compensation for noise voltages and inherent noise |
Input Characteristics
| Parameter | Value |
|---|---|
| Input Impedance | 1 MΩ |
| Input Capacitance | 25 pF |
| Input Coupling Modes | AC, DC, AC+DC |
| Maximum Continuous Input Voltage | 300 V RMS |
| Probe Scaling Support | Division factor support for commercial probes |
Measurement Speed and Dynamics
| Parameter | Value |
|---|---|
| Maximum Reading Rate | > 30 measurements/s (via IEC bus) |
Display and Math Functions
| Parameter | Value |
|---|---|
| Relative Measurement Mode | Yes |
| Statistical Functions | Maxima and Minima |
Accuracy
| Parameter | Value |
|---|---|
| Basic DC Accuracy | ±(0.05% of reading + 0.01% of range) |
| Basic AC Accuracy (at 1 kHz) | ±(0.05% of reading + 0.02% of range) |
Performance
| Parameter | Value |
|---|---|
| Inherent Noise | < 10 µV (in 1 mV range with short-circuited input) |
Outputs
| Parameter | Value |
|---|---|
| Analog Output | Linear (0 to 2 V) and Logarithmic (10 mV/dB) modes |
Measurement Ranges
| Parameter | Value |
|---|---|
| Voltage Measurement Ranges | 1 mV to 300 V (in 12 steps: 1/3/10 sequence) |
Frequency Counter
| Parameter | Value |
|---|---|
| Frequency Counter Measurement Range | 10 Hz to 30 MHz |
| Frequency Counter Sensitivity | 1 mV (10 Hz to 10 MHz), 10 mV (10 MHz to 30 MHz) |
Rear Panel Connections
| Parameter | Value |
|---|---|
| External Trigger Input | TTL level, BNC connector (rear panel) |
Technology
Broadband RMS Voltmeter
Applications
Precision AC and DC voltage measurements in RF, audio, and general-purpose test environments
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