HP-Agilent/Keysight E4407B

Agilent E4407B ESA-E 9kHz-26.5 GHz Spectrum Analyzer The Agilent E4407B spectrum analyzer is a wide band, very sensitive receiver. It works on the principle of “super-heterodyne receiver” to convert higher frequencies (normally ranging up to several 10s of GHz) to measurable quantities.