HP-Agilent/Keysight 8565E

The Keysight (Agilent/HP) 8565E 30 Hz – 50 GHz millimeter spectrum analyzer offers the measurement capability and performance previously found in larger, more expensive benchtop analyzers. You can measure signals from 30 Hz to 50 GHz (preselected above 2.75 GHz) with a single coaxial connection.

The 8565E combines outstanding phase noise, sensitivity, 1 Hz resolution bandwidths, synthesized tuning and wide dynamic range in a MIL-rugged package built to withstand harsh environmental conditions. It offers a complete solution for adjacent-channel power (ACP) testing of burst carrier signals using digital modulation, and the ability to measure occupied bandwidth percentage.
Keysight (Agilent/HP) 8565E Specifications:

Continuous 30 Hz to 50 GHz sweep
Fast digital resolution bandwidths of 1, 3, 10, 30 and 100 Hz
Adjacent channel power, channel power, carrier power, occupied bandwidth percentage and time-gated measurements standard
Precision timebase and 1 Hz counter resolution
MIL-T-28800 rugged
Measurement personalities for digital radio and phase noise measurements
Datasheet