Rohde and Schwarz FS-SNS40 Smart Noise Source, 100 MHz to 40 GHz

The Rohde & Schwarz FS-SNS40 is a smart noise source that generates calibrated noise signals from 100 MHz to 40 GHz for precision noise figure and gain measurements in receiver testing and characterization. The instrument automates parameter loading and accounts for environmental temperature, streamlining measurement workflows and enhancing reliability. Its smart capabilities electronically provide ENR tables and temperature data directly to compatible spectrum analyzers, enabling automatic uncertainty calculations without manual intervention.

– Technical Specifications

• Frequency Range: 100 MHz to 40 GHz
• Excess Noise Ratio (ENR): 10 dB to 17 dB
• Output Power: 1 W
• ENR Flatness (Uncertainty): ±0.10 dB to ±0.21 dB
• Temperature Coefficient: 0.009 dB/°C
• Return Loss/VSWR: 1.25:1, 1.50:1
• Power Supply: 5 V digital, 28 V analog; 30 mA to 500 mA
• Operating Temperature: 0 °C to 55 °C
• Storage Temperature: -40 °C to 71 °C
• RF Connector: 2.92 mm male (SMA-compatible)
• Control Interface: 7-pin cable
• Dimensions: 38.0 mm × 30.5 mm × 130.0 mm

– Key Features

• White noise signal generation for well-defined measurement conditions
• Automatic temperature readout for improved measurement accuracy
• Electronic ENR table delivery to analyzer for real-time uncertainty assessment
• Compact form factor optimized for bench and rack integration
• Low temperature coefficient ensures stable performance across operating ranges

– Typical Applications

• Receiver noise figure characterization
• Gain and noise performance validation
• LNA and RF component testing
• System-level receiver assessment

– Compatibility & Integration

The FS-SNS40 integrates directly with R&S®FSW, R&S®FSWP, R&S®FSMR3000, R&S®FSVA3000, R&S®FSV3000, R&S®FPL1000, R&S®ZNL, and R&S®FPS analyzers via the R&S®FSx-K30 noise figure measurement application firmware.