HP/Agilent E4402B Spectrum Analyzer, 9KHz – 3.0 GHz

HP/Agilent E4402B 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.  The received frequency spectrum is slowly swept through a range of pre-selected frequencies, converting the selected frequency to a measurable DC level (usually logarithmic scale), and displaying the same on the LCD of the Agilent E4402B. The LCD displays received signal strength (y-axis) against frequency ( x-axis).