Rohde & Schwarz FSU67 20Hz – 67GHz Spectrum Analyzer

The Rohde & Schwarz FSU67 is a spectrum analyzer spanning 20 Hz to 67 GHz in a single instrument, eliminating the need for external harmonic mixers across its entire frequency range. Direct measurement to 67 GHz combined with support for external mixers to 1 THz enables comprehensive RF characterization for aerospace and defense, microwave development, and 2.5G/3G component production. The analyzer delivers exceptional measurement quality: DANL of –158 dBm at 1 Hz bandwidth, third-order intercept exceeding +25 dBm typical, and total measurement uncertainty below 0.3 dB.

Phase noise reaches –160 dBc (1 Hz) at 10 MHz carrier offset, while adjacent channel leakage ratio achieves 84 dB typical with noise correction.

Technical Specifications

• Frequency range: 20 Hz to 67 GHz direct


• Frequency resolution: 0.01 Hz


• Expansion via external mixers to 1 THz


• External reference: 1 MHz to 20 MHz in 1 Hz steps


• Frequency counter resolution: 0.1 Hz to 10 kHz, selectable Signal Integrity


• DANL: –158 dBm (1 Hz), –152 dBm at 2 GHz, –148 dBm at 26 GHz, –130 dBm at 67 GHz (all 1 Hz bandwidth)


• Third-order intercept: >20 dBm, typical +25 dBm


• 1 dB compression point: +13 dBm (0 dB RF attenuation)


• Phase noise: –160 dBc (1 Hz) at 10 MHz offset typical


• Harmonic second-order intercept: 55 dBm typical


• ACLR: 77 dB typical (3GPP), 84 dB with noise correction


• Total measurement uncertainty: <0.3 dB Analysis & Filtering


• Resolution bandwidth: 10 Hz to 50 MHz standard; Fast FFT 1 Hz to 30 kHz


• Video bandwidth: 1 Hz to 10 MHz


• Digital filters: 10 Hz to 100 kHz; EMI filters at 200 Hz, 9 kHz, 120 kHz, 1 MHz


• Selectable trace points: 155 to 10001 Speed


• Frequency sweep: 2.5 ms minimum


• Zero span: 1 µs


• Measurement rate: Up to 80 measurements/s manual mode

Key Features

• QP detector and EMI bandwidth support


• GSM/EDGE and W-CDMA demodulation


• Full detector suite for diverse measurement requirements

Typical Applications Aerospace and defense RF analysis, microwave component development and production testing, metrology and calibration labs, amplifier production validation.

Compatibility & Integration GPIB and IEC/IEEE bus interfaces support automated measurement workflows with rates to 30 measurements/s (GPIB) and 70 measurements/s (zero span via bus).