For example: Agilent E4440A or Anritsu 68369
Analyzer
Analyzers, as test equipment, are versatile instruments used for measuring, analyzing, and characterizing various electrical, optical, or signal parameters, providing valuable insights into the performance and behavior of components, systems, and networks.
Rohde and Schwarz PR100
Portable Receiver for Mobile Radiomonitoring
Manufacturer: Rohde and Schwarz
Hioki PW6001
DC, 0.1 Hz to 2 MHz, 3-phase 4-wire, High Precision Power Analyzer for Motor and Inverter Efficiency Analysis
Manufacturer: Hioki