The Rohde & Schwarz SM300 is a high-performance vector signal generator covering a frequency range from 9 kHz to 3 GHz. Designed for lab, service, and automatic production applications, it offers AM, FM, ̆M, pulse, and IQ modulation. With a compact form factor, 0.1 Hz frequency resolution, and an integrated baseband I/Q modulator, the SM300 delivers versatile signal generation capabilities at an accessible price point.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 9 kHz |
| Maximum Frequency | 3 GHz |
| Frequency Resolution | 0.1 Hz |
Output
| Parameter | Value |
|---|---|
| Maximum Output Power | +13 dBm |
| Output Power Range | -127 dBm to +13 dBm |
| Phase Noise | <-95 dBc (1 Hz) at 20 kHz offset, 1 GHz carrier |
Modulation
| Parameter | Value |
|---|---|
| Modulation | AM, FM, φM, pulse, IQ |
| Sweep Modes | Frequency and level sweep (automatic, single, manual, step) |
| Pulse Modulation On/Off Ratio | > 80 dB |
| Pulse Modulation Rise/Fall Time | < 20 ns |
| I/Q Modulator Bandwidth | 50 MHz (RF bandwidth) |
General
| Parameter | Value |
|---|---|
| Reference Oscillator | 10 MHz, aging < 1 ppm/year, temperature effect < 1.5 ppm (0 °C to 50 °C) |
| Interfaces | USB |
| Display | Color TFT LCD (320 x 240 pixels) |
| Warm-up Time | 20 min |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 V to 240 V AC, 50 Hz to 60 Hz |
| Dimensions (W×H×D) | 320 mm × 102 mm × 356 mm |
| Weight | 5 kg |
Frequency Specifications
| Parameter | Value |
|---|---|
| LF Frequency Range | 20 Hz to 80 kHz |
| Frequency Switching Speed | <15 ms |
Amplitude Specifications
| Parameter | Value |
|---|---|
| Level Resolution | 0.1 dB |
| Level Uncertainty | <1 dB (for levels >-120 dBm) |
Spectral Purity
| Parameter | Value |
|---|---|
| SSB Phase Noise | <-95 dBc (1 Hz) (at f = 1 GHz, Δf = 20 kHz) |
| Harmonics | < -30 dBc (for level <= 10 dBm, f > 1 MHz) |
| Non-harmonics | < -60 dBc (at > 10 kHz offset, carrier <= 1.5 GHz) |
Analog Modulation
| Parameter | Value |
|---|---|
| Internal Modulation Generator | 20 Hz to 80 kHz |
System Connectivity and Interfaces
| Parameter | Value |
|---|---|
| RF Output Impedance | 50 Ω |
| RF Output Connector Type | N-type female |
RF Output
| Parameter | Value |
|---|---|
| Output VSWR | < 1.5 (f > 1 MHz, level <= 0 dBm) |
Environmental
| Parameter | Value |
|---|---|
| Operating Temperature Range | 0 °C to +50 °C |
| Storage Temperature Range | -40 °C to +70 °C |
Inputs & Outputs
| Parameter | Value |
|---|---|
| I/Q Inputs | I, Q (BNC female, 50 Ω) |
| External Reference Input | 10 MHz (BNC female, 50 Ω) |
| Reference Output | 10 MHz (BNC female) |
Internal Modulation Generator
| Parameter | Value |
|---|---|
| LF Generator Waveform | Sine |
| LF Generator Frequency Resolution | 0.1 Hz |
| LF Generator Output Voltage Range | 1 mV to 1 V (Vp) |
Reference Oscillator
| Parameter | Value |
|---|---|
| Reference Oscillator Aging | < 1 × 10^-6 per year |
| Reference Oscillator Temperature Stability | < 1.5 × 10^-6 (0 °C to 50 °C) |
Power Supply
| Parameter | Value |
|---|---|
| Power Consumption | max. 40 VA |
| Mains Frequency Range | 50 Hz to 400 Hz |
Compliance
| Parameter | Value |
|---|---|
| EMC Standard | Meets EN 55011 Class B, EN 61326 |
| Safety Standard | Meets EN 61010-1 |
Technology
RF Vector Signal Generation
Applications
Laboratory testing, RF device service, automatic production testing