As it happened I spent a large part of the day looking at the RBW filter responses using a couple of tinySAs. I don't see an issue. The 300 kHz and 600 kHz filters are the only ones that have issues. The rest are textbook perfect. Might be beneficial to evaluate the other possible RBW values. Then again, the picture I got from the tinySA is SA mode might not be accurate.
Electronic filters have a nomenclature and taxonomy and are a rather recent invention ca 1930's. I'm accustomed to using them as well as some other taxonomies.
Based on my tests today, I don't think significant improvement can be made except as part of a broader push for greater accuracy and dynamic range.
I continue to be staggered by the performance of the tinySA in all modes.
Have Fun!
Reg
