The Rohde & Schwarz FSQ26 is a high-performance spectrum and signal analyzer that combines advanced RF measurement capabilities with wideband signal analysis for aerospace, defense, and communications applications. Operating from 20 Hz to 26.5 GHz (extendable to 40 GHz), the FSQ26 delivers exceptional dynamic range, phase noise performance, and measurement speed for demanding development and production environments.
Technical Specifications
Frequency Coverage & Bandwidth
• Frequency range: 20 Hz to 26.5 GHz (40 GHz optional)
• Signal analysis bandwidth: 28 MHz standard; 120 MHz optional (R&S®FSQ-B72)
• Resolution bandwidth: 1 Hz to 50 MHz via digital filters, FFT, and channel filters
• Sweep time: 2.5 ms (frequency domain), 1 µs (time domain)
RF Performance
• Third-order intermodulation (TOI): +25 dBm typical
• 1 dB compression point: +13 dBm typical
• Displayed average noise level (DANL): -173 dBm (1 Hz) with preamplifier and noise correction; -151 dBm (1 Hz) at 26 GHz typical
• Adjacent channel leakage ratio (ACLR): 84 dBc/3GPP with noise correction
• SSB phase noise: -160 dBc/Hz @ 10 MHz offset (640 MHz center frequency)
Measurement Accuracy
• Total level uncertainty: 0.3 dB up to 3.6 GHz
• Linearity error: <0.1 dB down to -70 dB
Data Acquisition
• I/Q memory: 16 Msample standard, expandable to 705 Msample (options B100/B102)
• IF digitizer: 14-bit, 81.6 MHz sampling (20.4 MHz IF); 326.4 MHz with option FSQ-B72
• Measurement speed: Up to 80 measurements/s manual; 70 remote measurements/s via GPIB
– Key Features
• Highly selective digital filters with 10 Hz to 100 kHz range
• Fast FFT and RRC filter options for diverse signal types
• EMI and QP detector bandwidths: 200 Hz, 9 kHz, 120 kHz
• Multi-carrier wideband signal analysis (WLAN, LTE, WCDMA)
• Code domain power and modulation accuracy measurement
• Statistical analysis via CCDF and harmonic distortion functions
– Typical Applications
• Modulation accuracy verification for digital communication systems
• Adjacent channel power and interference analysis
• Harmonic and spurious emission measurement
• Wideband multicarrier signal characterization
• Phase noise and spectral purity assessment
– Compatibility & Integration
• GPIB (IEEE 488.2) and LAN (100BaseT) interfaces for remote control
• RS-232-C serial interface (9-pin D-Sub)
• VGA output (15-pin D-Sub)
• Digital baseband interface (option B17); trigger port (option B28)
• I/Q data export via GPIB or LAN for advanced post-processing
