Rohde & Schwarz FSL3 9KHz – 3GHz Spectrum Analyzer

The Rohde & Schwarz FSL3 is a compact spectrum analyzer spanning 9 kHz to 3 GHz, delivering high-end measurement capabilities in a portable platform. Built for development, service, and production environments, it combines precise spectral analysis with fast measurement speed and intuitive operation. The instrument achieves excellent price-performance value without compromising on dynamic range or functional depth, making it ideal for cost-conscious labs requiring professional-grade analysis across RF and microwave frequencies.

Technical Specifications

• Frequency Range: 9 kHz to 3 GHz


• Analysis Bandwidth: Up to 28 MHz


• Resolution Bandwidth Range: 10 Hz to 10 MHz or 1 Hz to 10 MHz


• Displayed Average Noise Level (DANL): Typically -162 dBm, -152 dBm, or -160 dBm (depending on frequency band)


• Third Order Intercept (TOI): Typically +18 dBm or +15 dBm


• Phase Noise: Typically -103 dBc (1 Hz) at 10 kHz offset


• RF Attenuator: Step-adjustable in 5 dB increments


• Maximum Dynamic Range: 95 dB


• Sweep Speed: Over 80 sweeps/s in zero span mode, including remote data output


• I/Q Demodulation Bandwidth: Up to 28 MHz

Key Features

• Direct access to primary functions via fixed-assignment keys; secondary functions accessible through softkeys and tables


• Channel Power, Adjacent Channel Power, and Fast ACP measurements


• Burst power (time-domain) analysis with integrated C/N and C/N0 measurement capability


• Occupied Bandwidth and AM modulation depth measurement


• Scalar network analysis and frequency deviation measurement


• Multisummary marker function for simultaneous time-domain level capture in single sweep


• Complete detector suite with selectable trace point resolution


• Integrated frequency counter and phase noise markers


• RRC and channel filter options


• Optional preamplifier (R&S FSL-B22) for dynamic range enhancement


• Tracking Generator available up to 3 GHz

Typical Applications Channel power characterization, adjacent channel interference analysis, modulation quality assessment, burst signal evaluation, network scalar measurements, and frequency stability verification across commercial and industrial RF bands.