The Marconi Instruments 2031 is a high-performance RF signal generator covering a frequency range from 10 kHz to 2.7 GHz. Designed for versatile R&D and manufacturing testing, it offers comprehensive analog modulation capabilities, including AM, FM, and phase modulation, alongside excellent spectral purity and precision control via GPIB.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 10 kHz |
| Maximum Frequency | 2.7 GHz |
| Frequency Resolution | 0.1 Hz |
| Frequency Range | 10 kHz to 2.7 GHz |
| Frequency Switching Speed | < 100 ms |
| External Reference Input Frequency | 1 MHz or 10 MHz |
Output
| Parameter | Value |
|---|---|
| Maximum Output Power | +13 dBm |
| Output Power Range | -144 dBm to +13 dBm |
| Phase Noise | -121 dBc/Hz (typical at 20 kHz offset, 1 GHz carrier) |
Modulation
| Parameter | Value |
|---|---|
| Modulation | AM, FM, Phase Modulation, Pulse (optional) |
| Sweep Modes | Linear and logarithmic frequency sweep, amplitude sweep |
| Pulse Modulation Rise/Fall Time (Option 005) | <15 ns |
| Pulse Modulation ON/OFF Ratio (Option 005) | >80 dB (frequency dependent) |
| FM Distortion | < 1% at 1 kHz rate |
| AM Distortion | < 1.5% at 30% depth (1 kHz rate) |
| Phase Modulation Distortion | < 1% at 1 kHz rate |
General
| Parameter | Value |
|---|---|
| Reference Oscillator | 10 MHz |
| Interfaces | GPIB (IEEE-488.2) |
| Display | Monochrome graphics LCD with backlight |
| Memory Storage Capacity | 100 complete instrument settings and 100 recall sequences |
| Display Technology | Backlit dot-matrix LCD |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 V to 240 V AC nominal (90 V to 265 V AC limits), 45 Hz to 440 Hz |
| Dimensions (W×H×D) | 424 mm x 152 mm x 566 mm |
| Weight | 16 kg |
Amplitude
| Parameter | Value |
|---|---|
| Minimum Output Power | -144 dBm |
| Amplitude Resolution | 0.1 dB |
| Output Voltage SWR | < 1.25:1 for carriers < 1.35 GHz, < 1.4:1 for carriers < 2.7 GHz (for levels < -7 dBm) |
| Maximum Reverse Power | 50 W from a 50 ohm source |
| RF Output Impedance | 50 ohms nominal |
Spectral Purity
| Parameter | Value |
|---|---|
| SSB Phase Noise | <-115 dBc/Hz (typically -121 dBc/Hz) at 20 kHz offset from a 1 GHz carrier |
| Harmonics | <-30 dBc for output levels up to +6 dBm |
| Non-Harmonics (Spurious) | <-70 dBc at offsets > 10 kHz (for carrier frequencies up to 1.35 GHz) |
| Sub-Harmonics | None up to 1.35 GHz; <-40 dBc from 1.35 GHz to 2.7 GHz |
| Residual FM | < 4.5 Hz RMS (300 Hz to 3 kHz bandwidth at 1 GHz) |
| Residual AM | < 0.05% RMS (300 Hz to 3 kHz bandwidth) |
Analog Modulation
| Parameter | Value |
|---|---|
| AM Depth Range | 0% to 99.9% |
| AM Resolution | 0.1% |
| FM Maximum Deviation | Up to 1 MHz (carrier frequency dependent) |
| Phase Modulation Rate Range | 10 Hz to 10 kHz (AC coupled) |
| Pulse Modulation | Available with Option 002 (Pulse Modulation) |
System Connectivity and Interfaces
| Parameter | Value |
|---|---|
| RF Output Connector Type | N-type female, 50 ohms |
| External Reference Input Connector | BNC female (rear panel) |
| Reference Output Connector | BNC female, 10 MHz (rear panel) |
Physical and Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +70 °C |
Power Requirements
| Parameter | Value |
|---|---|
| Line Voltage Range | 90 V to 265 V AC (nominal 100 V to 240 V AC) |
| Line Frequency Range | 45 Hz to 440 Hz |
Hardware and Software Options
| Parameter | Value |
|---|---|
| Option 001 | High Stability Oven Reference Oscillator |
| Option 002 | Pulse Modulation capability |
Internal Modulation Source
| Parameter | Value |
|---|---|
| Internal LF Generator Frequency Range | 0.1 Hz to 100 kHz |
| Internal LF Generator Frequency Resolution | 0.1 Hz |
| Internal LF Generator Waveforms | Sine, triangular, square |
| Internal LF Generator Output Level Range | 0.1 mV to 5 V RMS |
Memory & Storage
| Parameter | Value |
|---|---|
| Non-Volatile Memory | 100 store/recall locations |
Options
| Parameter | Value |
|---|---|
| Option 003 | Second Internal Modulation Oscillator |
| Option 006 | Avionics (VOR/ILS) |
| Option 008 | RF Level Protection |
| Option 011 | Electronic Attenuator |
| Option 012 | Rear Panel Outputs |
| Option 009 | Internal Pulse Generator |
| Option 010 | High Power RF Output |
Internal LF Generator
| Parameter | Value |
|---|---|
| Internal LF Generator Harmonic Distortion | < 0.1% at 1 kHz (sine wave, 2 V RMS) |
Sweep
| Parameter | Value |
|---|---|
| Sweep Trigger Modes | Continuous, Single, External, Manual |
Interfaces
| Parameter | Value |
|---|---|
| GPIB Emulation Modes | Marconi 2018, Marconi 2019, Marconi 2022 |
Inputs & Outputs
| Parameter | Value |
|---|---|
| External Modulation Input Connectors | Front panel BNC female (AM and FM/Phi-M) |
| LF Output Connector | Front panel BNC female |
Technology
Synthesized RF Signal Generator
Applications
RF testing, receiver characterization, and general laboratory stimulus
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