OK we have 3rd order intercept for mixers & amplifiers but when evaluating a spectrum analyser i would probably not measure any of its internal signals nut compare shoulder width and noise levels on signals
All but direct sampling spectrum analyzers are built around mixer(s). So you want to know not only max input power limit, but also 3rd order intercept and 1dB compression point.
regarding VNA i decided i did not require a full VNA system at home as it takes up a big chunk of space but the NanoVNA is defiantly worth looking at regarding the line
Proper VNAs are usually out of reach for most hobbyists. Well, perhaps except mentioned SVA1015X? NanoVNA looks like toy, but actually it is very capable device, especially considering it's price.
I do run 2 systems of HP 70000 spectrum analysers that are not budget items but the big problem with lab equipment is it is BIG
Better have big old "boat anchor" instrument rather than something small that only pretends to be one.
NWT4000 + DC-Block
Again - spectrum monitoring thingy. Can it do spectrum analysis with following settings: RBW=9KHz, VBW=10KHz, Start=150KHz, Stop=30MHz, Detector=Quazi-Peak? The same question for SDR's mentioned.