4051 Signal/Spectrum Analyzer Combining functions of a spectrum analyzer, modulation analyzer, pulse analyzer, transient analyzer, phase noise analyzer in a single instrument. Frequency range:  3 Hz to 4/9/13.2/18/26.5/40/45/50 GHz (A/B/C/D/E/F/G/H versions) Signal analyzing bandwidth: 200 MHz RBW: 1 Hz - 3 MHz Phase noise (carrier 1 GHz): -125 dBc/Hz @ 10 kHz Measurement sensitivity: -133dBm/Hz (50GHz)