Signal Hound is often asked about the performance of their real-time spectrum analyzer versus the performance of a traditional swept spectrum analyzer architecture. These are indeed valid questions, with answers often highlighting the differences between these architecture types. The topic of looking at signals close to the noise floor of a spectrum analyzer often arises during these discussions.
This PDF download discusses the concept of a noise floor with regard to a real-time spectrum analyzer, using EMC precompliance testing as an example.
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