Rohde and Schwarz FS-SNS55 Smart Noise Source, 100 MHz to 55 GHz

The Rohde & Schwarz FS-SNS55 is a smart noise source instrument that generates calibrated noise signals from 100 MHz to 55 GHz. It delivers 1 W output power with Excess Noise Ratio (ENR) spanning 7 dB to 21 dB, making it ideal for noise figure measurements, signal-to-noise ratio testing, and RF/microwave characterization. The FS-SNS55 combines high measurement accuracy with intelligent automation—automatic ENR table loading, uncertainty calculation via reflection coefficient data, and temperature compensation eliminate manual calibration overhead. Its compact form factor (38.0 × 30.5 × 130.0 mm) with 1.85 mm connectors integrates directly into benchtop and rack-mounted test configurations.

– Technical Specifications

• Frequency Range: 100 MHz to 55 GHz
• Output Power: 1 W
• Excess Noise Ratio (ENR): 7 dB to 21 dB
• ENR Flatness (Uncertainty): ±0.10 dB to ±0.41 dB
• Temperature Coefficient: 0.009 dB/°C
• VSWR: 1.50:1 to 2.50:1
• Operating Temperature: 0 °C to 55 °C
• Storage Temperature: −40 °C to 71 °C
• Dimensions (W × H × D): 38.0 mm × 30.5 mm × 130.0 mm
• Output Connector: 1.85 mm (Male)
• Power Supply: 5 V digital, 28 V analog
• Current Draw: 30 mA to 500 mA

– Key Features

• Smart technology enables automatic instrument recognition and calibration
• Automatic loading of ENR tables and uncertainty data
• Built-in temperature readout for real-time compensation
• Reflection coefficient measurement for automatic uncertainty budgeting
• 7-pin control cable interface

– Typical Applications

Noise figure characterization, gain-to-noise-figure correlation studies, receiver sensitivity testing, and amplifier cascade analysis across microwave and mmWave frequency bands.

– Compatibility & Integration

Natively compatible with R&S FSW, R&S FSWP, R&S FSMR3000, R&S FSVA3000, R&S FSV3000, R&S FPL1000, and R&S ZNL analyzers. Supported by the R&S Fxx-K30 noise figure measurement application. Optional Y adapter cable (R&S SNSCABLE-Y) available for legacy instrument integration. Supplied with interface cable, manual, and carrying case.