Rohde & Schwarz FSL6 9KHz – 6GHz Spectrum Analyzer

The Rohde & Schwarz FSL6 is a compact spectrum analyzer covering 9 kHz to 6 GHz, designed for research, development, service, and production environments. This lightweight instrument delivers high-end measurement capabilities in a portable form factor, balancing performance with accessibility for wireless communications, EMI analysis, and general signal characterization.

Technical Specifications

• Frequency range: 9 kHz to 6 GHz


• Resolution bandwidth: 300 Hz to 10 MHz (–3 dB, 1/3 sequence); optional 10 Hz to 10 MHz with R&S FSL-B7


• Video bandwidth: 10 Hz to 10 MHz


• Span accuracy: Nominal 0.1% (zero span), nominal 3% (≥10 Hz span) Amplitude Performance


• Displayed average noise level: Typically –162 dBm


• Amplitude range: DANL to +20 dBm


• Third-order intercept point: Typically +18 dBm


• Maximum rated input: DC 50 V


• RF attenuator: 5 dB steps Phase Noise


• –95 dBc/Hz (1 kHz offset, 500 MHz carrier)


• –103 dBc/Hz (10 kHz offset, 1 GHz carrier)


• –105 dBc/Hz (100 kHz offset, 500 MHz carrier)


• –120 dBc/Hz (1 MHz offset, 500 MHz carrier) Signal Analysis


• I/Q demodulation bandwidth: 20 MHz


• Sweep time: 1 µs to 16000 s (variable by span)

Key Features

• Multiple detector types: max, min, auto-peak, sample, RMS, average, quasi-peak


• Tracking generator available (up to 6 GHz)


• Resolution filter shape factor typically <5 (Gaussian)


• Low measurement uncertainty across microwave frequencies


• Weight: <8 kg

Typical Applications

• Wireless communication standard characterization


• EMI/RFI analysis and troubleshooting


• General-purpose spectrum and signal analysis


• Production and field service measurements

Compatibility & Integration

• 100BaseT LAN remote control (standard)


• USB host interface (standard)


• Optional GPIB interface (R&S FSL-B10)


• Windows XP Embedded operating system


• Optional internal battery pack for portable deployment


• Optional OCXO reference frequency (R&S FSL-B4)


• Optional gated sweep function (R&S FSL-B8)