Agilent / HP / Keysight 8563A

The 8563A Microwave Portable Spectrum Analyzer is a high-performance, synthesized technology, lightweight & rugged unit, covers the frequency range from 9 kHz to 22 GHz.
Option 26 extends the frequency range to 26.5 GHz.

The 8563A is an ideal choice for stimulus response measurements.
Provides up to 128 dB dynamic range and offset tracking capability when synthesized sources are used for stepped distortion and stepped conversion-loss measurements.

The 8563A meets MIL-T-28800C requirements for temperature, pulse shock, and transit drop, will withstand 30g so you do not have to worry about knocking this unit around.
The 8563A is the 5th generation of HP Spectrum Analyzer, easier than ever to use.