The HP/Agilent 70322A is a 4.2 GHz Synthesized Signal Generator Module for system integration (HPIB or MSIB-control) or for operation with a HP 70004A mainframe The signal generator has no display or front panel controls, because it is controlled by the 70004A display. Engineer's notes: Can't test, needs HP70004 mainframe. Unit turns on, visual inspection only.