N5511A Phase Noise Test System (PNTS)
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The Keysight Technologies, Inc. N5511A Phase Noise Test System (PNTS) is a replacement for the gold-standard Keysight E5500 phase noise measurement system. PNTS is the foundation of test setups that can measure phase noise down to kT (-177 dBm/Hz). This thermal phase noise floor is the theoretical limit for any measurement at room temperature therefore, PNTS can measure at the limits of physics.