1. Agilent
2. Infiniium_Phase_Noise

<h3>What is Phase Noise & Who Cares?</h3> I'll let [Wikipedia](http://en.wikipedia.org/wiki/Phase_noise) speak on the matter:<br> "In signal processing, Phase noise is the frequency domain representation of rapid, short-term, random fluctuations in the phase of a waveform, caused by time domain instabilities ("jitter"). Generally speaking, radio frequency engineers speak of the phase noise of an oscillator, whereas digital system engineers work with the jitter of a clock."<br> Since the timing of a signal is so crucial to the functional operation of any communications system