Agilent / HP / Keysight 8569A

This unit is a general purpose spectrum analyzer operating from 10MHz to 22GHz.

Optional external mixers can be used to extend the upper frequency to 40GHz.

It features a digital storage display with on-screen readout of switch settings at the top of the CRT display that keep the operator informed of all switch settings.

In addition it features an internal preselector above 1.7GHz, LED display of center frequency, and a gpib interface.

Direct plots to a plotter are supported.