For example: Agilent E4440A or Anritsu 68369
Rohde and Schwarz Signal Gen/Synthesizers/Sweepers
Rohde and Schwarz SMHU
100 Khz - 4320 MHz Synthesized Signal Generator
Manufacturer: Rohde and Schwarz
Rohde and Schwarz SMHU58
100 Khz - 4320 MHz Synthesized Signal Generator
Manufacturer: Rohde and Schwarz