The R&SFSWP phase noise analyzer and VCO tester combines extremely low_noise internal sources and cross_correlation technology, delivering extremely high sensitivity for phase noise measurements. As a result, it takes just seconds to measure even highly stable sources such as those found in radar applications. Additional options such as pulsed signal measurements, additive phase noise (including pulsed) characterization and integrated high_end signal and spectrum analysis make the analyzer a unique test instrument.