The Rohde & Schwarz SMH is a classic, high-performance RF signal generator covering a frequency range from 100 kHz to 2.0 GHz. It is designed for versatile laboratory testing, receiver measurements, and calibration, featuring comprehensive analog and pulse modulation capabilities.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 100 kHz |
| Maximum Frequency | 2 GHz |
| Frequency Resolution | 1 Hz |
Output
| Parameter | Value |
|---|---|
| Maximum Output Power | +13 dBm |
| Output Power Range | -137 dBm to +13 dBm |
| Phase Noise | -124 dBc/Hz (at 20 kHz offset, 1 GHz carrier) |
Modulation
| Parameter | Value |
|---|---|
| Modulation | AM, FM, Phase Modulation (φM), Pulse Modulation |
| Sweep Modes | Frequency, Level (digital step sweep) |
| FM Distortion | < 0.5% (at 40 kHz deviation, 1 kHz modulation frequency) |
| AM Distortion | < 1% (at 30% depth), < 2% (at 80% depth) at 1 kHz modulation frequency |
General
| Parameter | Value |
|---|---|
| Reference Oscillator | 10 MHz |
| Interfaces | GPIB (IEEE-488) |
| Display | LCD |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 V / 120 V / 220 V / 240 V AC (±10%), 47 Hz to 440 Hz |
| Dimensions (W×H×D) | 435 mm x 147 mm x 460 mm |
| Weight | 16 kg |
System Connectivity and Interfaces
| Parameter | Value |
|---|---|
| RF Output Connector Type | N female (front panel) |
| RF Output Impedance | 50 Ω |
| External Reference Input Connector | BNC female (rear panel) |
| Reference Output Connector | BNC female (rear panel) |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Switching Speed | <15 ms |
| External Reference Input Frequency | 10 MHz |
Amplitude Specifications
| Parameter | Value |
|---|---|
| Amplitude Resolution | 0.1 dB |
Analog Modulation
| Parameter | Value |
|---|---|
| AM Depth Range | 0% to 99% |
| AM Resolution | 0.5% |
| Pulse Modulation On/Off Ratio | >80 dB |
| Pulse Modulation Rise/Fall Time | <20 ns |
Spectral Purity
| Parameter | Value |
|---|---|
| Harmonics | <-30 dBc (for output levels <= 10 dBm) |
| Non-Harmonics (Spurious) | <-74 dBc (1000 to 2000 MHz), <-80 dBc (<1000 MHz) |
| Wideband Noise | <-140 dBc/Hz (at >2 MHz offset, carrier <1 GHz) |
| Subharmonics | < -50 dBc (for carrier frequencies > 1000 MHz) |
| Residual FM | < 2 Hz (at 500 MHz carrier, 0.3 kHz to 3 kHz bandwidth) |
| Residual AM | < 0.02% (0.3 kHz to 3 kHz bandwidth) |
Physical and Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Temperature Range | 0 °C to +55 °C |
Power Requirements
| Parameter | Value |
|---|---|
| Power Consumption | 120 VA |
AF Generator
| Parameter | Value |
|---|---|
| AF Generator Frequency Range | 10 Hz to 100 kHz |
| AF Generator Frequency Resolution | 1 Hz |
| AF Output Level Range | 1 mV to 1 V |
| AF Output Level Resolution | 1 mV |
Modulation (FM)
| Parameter | Value |
|---|---|
| External FM Modulation Frequency Range | DC to 100 kHz (DC-coupled), 10 Hz to 100 kHz (AC-coupled) |
Modulation (Phase)
| Parameter | Value |
|---|---|
| External Phase Modulation Frequency Range | 20 Hz to 20 kHz |
RF Output
| Parameter | Value |
|---|---|
| Output VSWR | < 1.5 (for level < 0 dBm) |
Options
| Parameter | Value |
|---|---|
| OCXO Reference Option (SMH-B1) Aging | < 1 x 10^-9 / day (after 30 days of operation) |
Protection
| Parameter | Value |
|---|---|
| Overload Protection Max RF Power | 50 W |
| Overload Protection Max DC Voltage | 35 V |
Memory
| Parameter | Value |
|---|---|
| Save/Recall Memory Locations | 50 complete instrument setups |
Technology
RF Signal Generation
Applications
Receiver testing, analog modulation measurements, laboratory RF testing