Rhode and Schwarz FSW50 Spectrum Analyzer

The Rohde & Schwarz FSW50 is a signal and spectrum analyzer engineered for demanding RF and microwave measurements across research, development, production, radar systems, and satellite applications. It delivers frequency coverage from 2 Hz to 50 GHz (extendable to 110 GHz with external harmonic mixers), combined with real-time analysis bandwidth to 800 MHz and internal analysis bandwidth up to 8.3 GHz. The instrument achieves displayed average noise level of −159 dBm/Hz typical at 2 GHz without preamplifier, improving to −169 dBm/Hz at 40 GHz with the optional R&S®FSW-B24 preamplifier.

Technical Specifications

• Frequency Range: 2 Hz to 50 GHz (up to 110 GHz with external harmonic mixers)


• Frequency Resolution: 0.01 Hz


• Analysis Bandwidth (Internal): Up to 8.3 GHz


• Real-Time Analysis Bandwidth: Up to 800 MHz


• Resolution Bandwidth: 1 Hz to 10 MHz standard; options to 20 MHz, 50 MHz, and 80 MHz with R&S®FSW-B8


• Video Bandwidth: 1 Hz to 10 MHz standard; optional 20 MHz, 50 MHz, and 80 MHz


• Displayed Average Noise Level: −159 dBm/Hz at 2 GHz; −169 dBm/Hz at 40 GHz with preamplifier


• Phase Noise: Less than −134 dBc/Hz at 10 kHz offset


• Third Order Intercept: −20 to 28 dBm


• Image Rejection: Less than −90 dBc


• Spurious-Free Dynamic Range: Greater than 100 dBc


• Power Supply: 100–240 V AC, 200 W typical

Key Features

• Detects nanosecond-range sporadic interference up to 800 MHz bandwidth near powerful carriers


• Integrated 12.1-inch multi-touch display with Windows 10-like interface and MultiView capability


• Phase noise and noise figure measurement applications (K40, K30)


• Modulation analysis (K7, K70) and 5G NR measurement support (K144, K145)


• Pulse measurement application (K6) and spurious measurement option (K50)


• Embedded SCPI recorder for automated measurement code generation


• Frequency hopping analysis and generation capabilities

Typical Applications

• RF and microwave device development and production testing


• Radar system characterization


• Satellite RF signal demodulation (DVB-S2X, OneWeb)


• IEEE 802.11ay analysis


• Group delay, linearity, and gain transfer measurements

Compatibility & Integration External harmonic mixers enable frequency coverage to 110 GHz. Optional preamplifier (R&S®FSW-B24) optimizes sensitivity at microwave frequencies.