The Rohde & Schwarz FSWP50 is a phase noise analyzer and VCO tester engineered for characterization of oscillators, synthesizers, and frequency sources up to 50 GHz. It combines signal and spectrum analyzer capabilities with dedicated phase noise measurement, delivering simultaneous analysis of phase and amplitude noise across demanding applications including pulsed sources. The instrument integrates cross-correlation technology and ultra-low-noise internal references to achieve high sensitivity and measurement certainty, while automated VCO characterization streamlines tuning slope, output power, and frequency mapping versus control voltage.
Technical Specifications
Frequency Range
• 1 MHz to 50 GHz (base unit)
• Up to 500 GHz with external harmonic mixers
• Up to 56 GHz with external LO inputs
• Up to 325 GHz with external mixers
• Signal analyzer: 10 Hz to 50 GHz (with option B1)
Phase Noise Performance
• Sensitivity at 1 GHz, 10 kHz offset: –172 dBc (1 Hz)
• Sensitivity at 10 GHz, 10 kHz offset: –153 dBc (1 Hz)
• Measurement uncertainty: < 0.2 dB (up to 3.6 GHz), < 0.3 dB (up to 8 GHz), < 2 dB (10 mHz to 1 MHz), < 2.5 dB (1 to 30 MHz), < 1.5 dB (1 µHz to 10 mHz offset)
Spectrum Analyzer Performance
• DANL: –156 dBm (1 Hz) without noise cancellation; below –165 dBm (1 Hz) with preamplifier; near –174 dBm (1 Hz) with noise cancellation
• Third-order intercept (TOI): typically 25 dBm
• 1 dB compression: +13 dBm (0 dB RF attenuation)
Analysis Bandwidth
• Standard: up to 80 MHz
• Optional: up to 320 MHz
• External mixers: up to 56 GHz
– Key Features
• Phase and amplitude noise measured simultaneously
• Phase noise measurement on pulsed sources and residual phase noise characterization
• Additive phase noise analysis including pulsed signals
• Transient analysis for frequency and phase time-domain measurements
• Allan deviation and Allan variance computation
• Spurious signal detection and display
• Modulation analysis: AM, FM, PM
• Automated VCO characterization: frequency vs. voltage and tuning slope vs. voltage
– Typical Applications
Oscillator and synthesizer qualification, VCO tuning curve mapping, phase noise compliance verification, transient behavior analysis, and broadband spurious identification.
