Rohde and Schwarz SGS100A SGMA RF Source

The Rohde & Schwarz SGS100A SGMA is a high-performance RF source delivering both continuous wave and vector signal generation for automated test systems. Operating from 1 MHz to 12.75 GHz (80 MHz to 12.75 GHz for I/Q-modulated signals), the instrument combines exceptional signal purity with fast settling times via PCIe and Ethernet interfaces. An integrated I/Q modulator enables complex modulation schemes, while optional pulse modulation and baseband bypass mode extend signal generation flexibility. The 50 Ω source impedance and calibrated output power support demanding R&D and production environments requiring precision signal synthesis across wide bandwidth and dynamic range.

– Technical Specifications

Frequency Performance
• Frequency range (CW): 1 MHz to 12.75 GHz
• Frequency range (I/Q-modulated): 80 MHz to 12.75 GHz
• Frequency resolution: 0.01 Hz
• Optional high-stability OCXO reference oscillator
• Optional phase coherent LO input/output for multi-instrument phase coherence

Output Level
• Maximum output: >+20 dBm (electronic attenuator); +22 dBm typical (loss compensation); >+19 dBm (with attenuator)
• Level range with R&S SGS-B26 attenuator option: –120 dBm to +25 dBm
• Calibrated output power to +18 dBm
• Source impedance: 50 Ω (nominal)
• Optional wear-free electronic step attenuator (R&S SGS-B26) with AUTO or uninterrupted switching

Signal Purity
• SSB phase noise at 1 GHz: –133 dBc (20 kHz offset, typical)
• SSB phase noise at 2 GHz: <–120 dBc measured; –127 dBc typical
• SSB phase noise at 10 GHz: <–106 dBc measured; –113 dBc typical
• Wideband noise: <–145 dBc
• Non-harmonic suppression: 10 kHz offset, ≤1500 MHz)
• Image sideband suppression: 40 dB (±10 MHz, measured)

– Key Features

• Integrated I/Q modulator for vector signal generation
• Baseband bypass mode for externally generated modulated signals below I/Q modulator limits
• Optional internal pulse generator with pulse modulation capability
• Very high level accuracy and repeatability
• Fast instrument settling via modern interfaces

– Typical Applications

Automated test systems, receiver characterization, transmitter validation, and signal synthesis across microwave and RF bands requiring low phase noise and wide dynamic range.

– Compatibility & Integration

PCIe and Ethernet control interfaces; 50 Ω RF output; optional coherent LO distribution for phase-locked multi-instrument configurations.