Rohde & Schwarz FSU50 20Hz – 50GHz Spectrum Analyzer

The Rohde & Schwarz FSU50 is a spectrum analyzer operating from 20 Hz to 50 GHz, engineered for RF characterization in aerospace, defense, and microwave applications. It delivers dynamic range, phase noise performance, and measurement accuracy through a comprehensive detector suite and flexible resolution bandwidth architecture. The instrument executes frequency-domain sweeps in 2.5 ms and time-domain acquisitions in 1 µs, enabling rapid signal assessment across demanding test scenarios.

Technical Specifications

Frequency Coverage: 20 Hz to 50 GHz (DC coupled) Resolution Bandwidth: 10 Hz to 50 MHz with selectable filter types - digital filters (10 Hz to 100 kHz), fast FFT filters (1 Hz to 30 kHz), channel filters (100 Hz to 5 MHz), RRC filters, and analog filters (300 kHz to 10 MHz). EMI bandwidths include 200 Hz, 9 kHz, and 120 kHz options. Amplitude Performance: DANL of −158 dBm (1 Hz bandwidth); 1 dB compression point at +13 dBm; TOI exceeding +20 dBm (typically +25 dBm); second-order harmonic intercept typically 55 dBm. ACLR performance reaches 77 dB (3GPP) and 84 dB with noise correction. RMS detector provides 100 dB dynamic range. Display linearity: 0.3 dB total measurement uncertainty across DANL to +30 dBm range. Phase Noise: −160 dBc/Hz at 10 MHz offset; −123 dBc (1 Hz) at 10 kHz offset. Sweep Capability: Frequency-domain minimum 2.5 ms; time-domain minimum 1 µs; maximum sweep duration 16,000 s. Measurement Speed: Up to 20 measurements/s manual; 30 measurements/s via GPIB; 70 measurements/s sustained.

Key Features

• Demodulation support for GSM/EDGE, W-CDMA, TD-SCDMA, cdma2000, 1xEVDO, and 1xEVDV


• Adjacent channel power (ACP) measurement in time domain


• Statistical analysis via CCDF (complementary cumulative distribution function)


• Standard measurement routines: TOI, MC ACPR, OBW, APD, gated sweep, IF power trigger


• Dual test port adapters: 2.4 mm and N female connectors

Connectivity & Control LAN, GPIB (IEEE 488.2), RS-232-C (9-pin SUB-D), and VGA output (15-pin SUB-D). SCPI-compatible GPIB command set with R&S FSE/FSIQ backward compatibility.