.. 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..
Resting stats is something that you do all the time. It went over your head that to get good measurements, you need to measure several time to assure all is right. You do that by keeping scope running, and resetting stats several times.
How they do that -120 to -140dB dynamic range with a 12bit ADC?
PS: provided you mean the "noise floor" - how they could achieve such a low n.floor?
Resting stats is something that you do all the time. It went over your head that to get good measurements, you need to measure several time to assure all is right. You do that by keeping scope running, and resetting stats several times.
Please provide a concrete example of when manual resetting is better than simply seeing (eg.) the RMS of the last 100 acquisitions on a 'scope that's constantly running.
I can easily think of when sliding window is much more useful, eg. when you're fiddling with a trim pot and don't want to keep reaching over to the 'scope to reset the stats every time you adjust it.
I'm struggling to think of an example where manual resetting is better.
.. 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..
How they do that -120 to -140dB dynamic range with a 12bit ADC?
PS: provided you mean the "noise floor" - how they could achieve such a low n.floor?
Resting stats is something that you do all the time. [...]Please provide a concrete example of when manual resetting is better [...]
Don't be mad if I don't, I explained several times.
Just think about it more, you will understand.
Every scope I have, have reset button directly inside stat window.
Resting stats is something that you do all the time. [...]Please provide a concrete example of when manual resetting is better [...]
Gentlemen, I am confused now. I thought you had found that manually resetting the statistics is possible with the DHO800? The user manual seems to say that the operation can even be assigned to the Quick button on the front panel if you need to use it often.
If I got this right and the scope does offer the choice of manually resetting stats -- what is the debate about?
Don't be mad if I don't, I explained several times.
All you explained is that you like to press reset, not that it's necessary.Just think about it more, you will understand.
Every scope I have, have reset button directly inside stat window.
Argument from authority. Got it.
Anyway: You're avoiding the question. Can the Siglent do all this segmention/stats stuff?
.. 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..
How they do that -120 to -140dB dynamic range with a 12bit ADC?
PS: provided you mean the "noise floor" - how they could achieve such a low n.floor?
If you don't understand why you would need to reset stats all the time while doing measurements, than I cannot explain
If you don't understand why you would need to reset stats all the time while doing measurements, than I cannot explain
I don't see any difference between resetting and simply waiting 2 seconds for the window to slide along.
(apart from the physical movement of your arm)
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?
.. 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..How they do that -120 to -140dB dynamic range with a 12bit ADC?
PS: provided you mean the "noise floor" - how they could achieve such a low n.floor?Some literature to scratch the surface...
https://www.edn.com/dsos-and-noise/
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?so you didnt see the picture of built-in FFT i posted?
312K FFT points (625Ksamples) i'm providing both i'm not sure what siglent marketing hype refering to "points"?
How deep is sliding window ?
What timebase?
The FFT picture above tells me the real spectral lines of your signal (11 lines) are positioned in -30dB to -90dB band and they come from the FFT. All other spectral components you may see there is a math junk..
If it's taking its sweet time about settling down then feel free to manually reset it (or, more sensibly, adjust the window size so you don't need to reset it on the next change to your circuit).
The FFT picture above tells me the real spectral lines of your signal (11 lines) are positioned in -30dB to -90dB band and they come from the FFT. All other spectral components you may see there is a math junk..
Some of that grass will be spurious tones from ADC nonlinearities, and some are folded back signal that was aliased.
How deep is sliding window ?
Whatever you want. (eg. In my segmentation test I set it to '4')
It remembers the setting, even across power cycles.What timebase?
Doesn't matter. You can easily look at the number and see if it's still settling or not.
If it's taking its sweet time about settling down then feel free to manually reset it (or, more sensibly, adjust the window size so you don't need to reset it on the next change to your circuit).
If it's taking its sweet time about settling down then feel free to manually reset it (or, more sensibly, adjust the window size so you don't need to reset it on the next change to your circuit).
Also: If it never settles down then you know the system isn't stable.
Your manually-reset stats might hide that valuable information from you.
Some of that grass will be spurious tones from ADC nonlinearities, and some are folded back signal that was aliased.same rule applied to any FFT calculating machine, siglent, rigol, tek, hp R&S whatever. is at the mercy of sampling HW system. to get rid aliasing entirely, you need brickwall filter, and that is a theoritical filter one cant achieve in real world. unless you are far crippling the sampling mechanism with uch uch lower BW filter.
Otherwise known as "artifacts".
While studying physics at the University of Chicago, I had friends in the archaeology department who thought artifacts were a good thing (as opposed to rocks carved by natural processes).