The Advantest R3131 is a 3 GHz Personal Spectrum Analyzer designed for RF measurement, installation, and maintenance applications. It features a frequency range of 9 kHz to 3 GHz, a wide dynamic range, and built-in functions for high-accuracy signal analysis.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (IEEE-488), RS-232, Centronics printer port |
| Display | 5.7-inch monochrome LCD with backlight |
| Warm-up Time | 15 minutes |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 to 240 VAC, 50/60 Hz, power consumption <= 100 VA |
| Operating Temperature | 0 to +50 °C |
| Dimensions (W×H×D) | 350 × 177 × 420 mm |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 9 kHz to 3 GHz |
| Frequency Span Range | 50 kHz to 3 GHz, plus Zero Span |
| Reference Frequency Aging Rate | ±2 ppm/year |
| Reference Frequency Temperature Stability | ±5 ppm (0 °C to 50 °C) |
| Marker Frequency Counter Resolution | 1 Hz to 1 kHz |
Spectral Purity and Noise
| Parameter | Value |
|---|---|
| Phase Noise at 20 kHz Offset | <= -100 dBc/Hz |
| System Displayed Average Noise Level (DANL) | -113 dBm @ 1 GHz (1 kHz RBW, 10 Hz VBW, 0 dB input attenuation) |
Amplitude and Dynamic Range Specifications
| Parameter | Value |
|---|---|
| Amplitude Measurement Range | +20 dBm to Average Noise Level |
| Maximum Safe RF Input Level (Power) | +30 dBm (with >= 10 dB input attenuation) |
| Maximum Safe DC Input Voltage | 0 VDC |
| Input Attenuator Range | 0 to 50 dB |
| Input Attenuator Steps | 10 dB |
| Display Log Scale Range | 10, 5, 2, 1 dB/div (10 divisions) |
| Display Linear Scale | 10%/div of reference level |
Bandwidth (RBW / VBW)
| Parameter | Value |
|---|---|
| Resolution Bandwidth (RBW) Range | 1 kHz to 1 MHz |
| Resolution Bandwidth (RBW) Steps | 1, 3 sequence |
| Video Bandwidth (VBW) Range | 10 Hz to 1 MHz |
| Video Bandwidth (VBW) Steps | 1, 10 sequence |
Sweep and Trigger
| Parameter | Value |
|---|---|
| Sweep Time Range (Span > 0) | 50 ms to 500 s |
| Sweep Time Range (Zero Span) | 50 µs to 500 s |
RF Inputs and Outputs
| Parameter | Value |
|---|---|
| RF Input Connector Type | N-type (female) |
| RF Input Impedance | 50 Ω (nominal) |
| Calibration Output Frequency | 30 MHz |
| Calibration Output Level | -20 dBm |
User Interface and Display
| Parameter | Value |
|---|---|
| Display Size | 5.7-inch |
Environmental and Standards Compliance
| Parameter | Value |
|---|---|
| Storage Temperature Range | -20 to +60 °C |
| Maximum Operating Humidity | 85% RH (non-condensing) |
Frequency
| Parameter | Value |
|---|---|
| Frequency Resolution | 1 Hz |
| RBW Shape Factor (60 dB / 3 dB) | < 15:1 |
Amplitude
| Parameter | Value |
|---|---|
| Calibration Accuracy | ±0.5 dB (at 30 MHz) |
| Frequency Response | ±1.0 dB (100 kHz to 3.0 GHz, attenuator at 10 dB) |
| Display Scale Fidelity | ±1.5 dB / 90 dB (log scale) |
| RBW Switching Uncertainty | ±0.3 dB (after calibration, referenced to 3 kHz RBW) |
| Input Attenuator Switching Accuracy | ±1.1 dB (at 10 dB reference, 100 kHz to 3.0 GHz, 20 to 50 dB) |
Dynamic Range
| Parameter | Value |
|---|---|
| Second Harmonic Distortion | <-70 dBc (mixer level -30 dBm, input frequency > 10 MHz) |
| Third Order Intermodulation Distortion | <-70 dBc (for two -30 dBm tones at mixer, >10 MHz, 50 kHz spacing) |
| 1 dB Gain Compression | > -5 dBm (mixer level, input frequency > 10 MHz) |
Inputs & Outputs
| Parameter | Value |
|---|---|
| External Reference Input Frequency | 10 MHz |
| External Reference Input Level | -5 dBm to +5 dBm |
| Internal Reference Output Frequency | 10 MHz |
| External Trigger Input Impedance | 10 kΩ (nominal, DC-coupled) |
| External Trigger Input Level | TTL level (0 to 5 V) |
Tracking Generator (Option 74)
| Parameter | Value |
|---|---|
| TG Frequency Range | 100 kHz to 3.0 GHz (Option 74) |
| TG Output Level Range | 0 to -50 dBm (Option 74, 0.1 dB steps) |
| TG Output Impedance | 50 Ω (Option 74) |
Measurement Suite / Features
| Parameter | Value |
|---|---|
| Detection Modes | Normal, Positive Peak, Negative Peak, Sample |
| Trace Functions | Write, Max Hold, View, Average |
| EMI Filters | 9 kHz, 120 kHz (6 dB bandwidth) |
Sweep
| Parameter | Value |
|---|---|
| Trigger Modes | Free Run, Single, Video, External, Line |
Storage
| Parameter | Value |
|---|---|
| Storage Drive | 3.5-inch FDD (MS-DOS format) |
Power
| Parameter | Value |
|---|---|
| Power Consumption | 200 VA or less |
Performance
| Parameter | Value |
|---|---|
| Input VSWR | <= 1.5:1 (100 kHz - 3 GHz, input attenuation >= 10 dB) |
| Residual Response | <= -80 dBm (10 MHz - 3 GHz, input attenuation 0 dB) |
| Local Oscillator Emission | <= -70 dBm (with 10 dB input attenuation) |
Storage & Interface
| Parameter | Value |
|---|---|
| Internal Memory Capacity | 10 states and traces |
Technology
Superheterodyne Spectrum Analyzer
Applications
RF Spectrum and Signal Analysis
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