sniff sniff i smell siglent fanboyism... this is DHO800 thread, not DHO900 MSO remember? i heard DHO800 FFT not good? i provided facts not fart talk, tell me what SA price has -120 to -140dB dynamic range? this is possible because Rigol proved themselve by providing API documentation and working PC SW example since DS1000E, and it got better and better. i havent seen one single sig-fanboy proved otherwise (siglent has better FFT? duh!) thats why i stick with Rigol brand... my Anritsu MS8609A cant reach -100dB let alone -140dB.. ignoring the fact by nitpick is of no use, try to prove its antialiasing weakness by eyeballing sine/repeating signal beyond nyquist sampling limit is unrealistic in real circuit debugging, if it is, why mourn entry level scope for that? get one of those 10GSa/s Lecroy DSO then you can be happy to probe your 500MHz at 20 points per cycle..
here again look carefully, open your eyes wide (attached image) and tell me what wrong with it? if you dont have clue, it proves you are the siglent fan boyism... this is only 5Mpts, i can push to 50Mpts now, and then do averaging to get even lower noise and smaller RBW. i know i know before you argue, DSO is no place for SA (same as LA is not for DSO to do imho), get the real SA. i did, but i know i have one extra tool at $400 to do redundant verification. now i have two actually, DS1000Z and DHO804 (err... or should is say DHO924? thanks to hubertyoung and friends) LA? serial decoding? i will venture DHO924 later when i need it, glad to know its there but so far my clone salae logic can do the job for my simple need.
Ad hominem again... Call me what you want, I still have bought more Rigol than Siglent products in my life so far.
Could you please explain what are these images?
Are those screenshots from scope, or made on PC from data pulled.
If those are made on your PC from data pulled from scope, that is just funny.
We are arguing FFT implementation on a scope is half cooked, and to disprove me you post images of FFT that you made on PC because FFT on scope is crap...
What a great irony is that?
And again, you just hate whatever I say without reading or understanding what i meant.
I did not say ADC is bad, I did not say input is noisy. I repeatedly asked if someone could pull data on PC so we can see how well ADC performs, because on scope FFT is weird..
Same as Fungus, you guys fight so hard not to do the right thing... If I was not insistent we still would have no good data.
So despite your argumentative and rude post I thank you for data...