- Why is there a "notch" in the spectrum?
- Why does the spectrum look different than expected?
- I compared the spectrum of the NWT4000 with the spectrum of my professional spectrum analyser and it looks much different... Why?
For example, this is how my local FM radio band looks like, when using my "SMA Simple Spectrum Analyzer" with ADF4351:
To explain the concept, here is the a signal captured with different RBW values: