Rohde & Schwarz FSW26 2Hz to 26.5GHzSignal and Spectrum Analyzer

The Rohde & Schwarz FSW26 is a signal and spectrum analyzer covering 2 Hz to 26.5 GHz, engineered for aerospace, defense, wireless communications, and EMC testing. It delivers exceptional phase noise performance, sensitivity, and dynamic range exceeding 100 dBc across its operating band. The FSW26 supports modulation analysis, spectrum analysis, and signal analysis across 5G NR, WLAN, Bluetooth, and legacy standards.

Its architecture provides multiple analysis bandwidth options - from 160 MHz to 8.3 GHz internally, with 512 MHz real-time analysis capability - enabling both broadband and narrowband signal characterization. Measurement uncertainty remains under 0.4 dB up to 8 GHz, ensuring traceable accuracy in production and field environments.

Technical Specifications

• DC coupled: 2 Hz to 26.5 GHz


• AC coupled: 10 MHz to 26.5 GHz


• With external harmonic mixers: up to 110 GHz Phase Noise:


• 1 GHz carrier, 10 kHz offset: –137 dBc (1 Hz) typical


• 1 GHz carrier, 100 Hz offset: –110 dBc (1 Hz) typical


• 10 GHz carrier, 10 kHz offset: –128 dBc (1 Hz) typical; –133 dBc (1 Hz) typical


• 1 MHz offset: –145 dBc (1 Hz) typical


• 10 MHz offset: –149 dBc (1 Hz) typical Sensitivity (DANL without preamplifier):


• 2 GHz: –159 dBm (1 Hz)


• 8 GHz: –156 dBm (1 Hz)


• 20 GHz: –150 dBm (1 Hz)


• 25 GHz: –150 dBm (1 Hz)


• 40 GHz: –144 dBm (1 Hz)


• 2 Hz: –120 dBm (1 Hz) With optional preamplifiers (R&S FSW-B24): –169 dBm (1 Hz) at 8 GHz; –166 dBm (1 Hz) at 20 GHz; –165 dBm (1 Hz) at 40 GHz. Noise cancellation improves DANL by up to 13 dB. Dynamic Range:


• Spurious-free dynamic range: > 100 dBc


• WCDMA ACLR with noise cancellation: 88 dB Analysis Bandwidth:


• Internal: 160 MHz to 8.3 GHz


• Real-time: 160 MHz to 512 MHz


• With R&S FSW-B512: 80 MHz to 512 MHz Measurement Accuracy:


• Total measurement uncertainty: < 0.4 dB up to 8 GHz

Key Features

• Large touchscreen with multiview display


• Selectable analysis bandwidths for signal-specific optimization


• Low phase noise enables precision frequency stability and modulation quality assessment


• Intermodulation suppression and spurious measurement capability


• Optional harmonic mixer extension to 110 GHz

Typical Applications

• Aerospace and defense signal characterization


• 5G NR and WLAN modulation analysis


• EMC pre-compliance testing


• Bluetooth and legacy standard compliance verification

Compatibility & Integration Expands to 110 GHz with external harmonic mixers. Integrates with R&S RTO2044 oscilloscope (5 GHz analysis bandwidth) for time-domain correlation. Optional preamplifiers and noise cancellation modules enhance sensitivity across specific frequency bands.