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
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Manufacturer: Rohde and Schwarz
Rohde and Schwarz SMHU58
100 Khz - 4320 MHz Synthesized Signal Generator
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Manufacturer: Rohde and Schwarz