Here you go:
SDS824X HD_Sine_450MHz_1GSa_Singlehere you demo that at some setup Sr / 2.22, sds800x is unable to reconstruct signal properly? from the look of it, yes it is.
Hence I would stick with my conclusion that we still get a stable interpolation at sampling freq / 2.22.
The image seems to be named incorrectly. This was 490 MHz, or sample_rate / 2.04.
Hence I would stick with my conclusion that we still get a stable interpolation at sampling freq / 2.22.Well, quantify "stable". In the SDS824X HD_Sine_450MHz_1GSa_FFT screenshot, we see a signal to distortion ratio of about 28 dB (about 4% distortion) for f=0.45*sample_rate. Whether you consider that to be good or bad is relative, but it is already perceptible.
Discussion is going in wrong direction. Beginner that wants entry level scope has no knowledge to understand all DSP stuff being discussed. They need device to simply work. User will bring in enough of it's own confusion into the process.
Rigol (unlocked to to 250 MHz) and applied 200 MHz signal to all enabled channels
here you demo that at some setup Sr / 2.22, sds800x is unable to reconstruct signal properly? from the look of it, yes it is.
A "beginner that wants entry level 'scope" probably has no 200Mhz signals lying around anyway.
I agree that the machine tool analogy proved to be less than helpful.
...
Maybe I should give up on trying to generate analogies ... I think I'm going from bad to worse!
I agree that the machine tool analogy proved to be less than helpful. It was intended to illustrate the different needs and perspectives of hobby users vs. professionals, but seemed to slide off into a discussion about size. Somehow, as a 63-year-old male, it always seems to come back to a debate about size ...
I keep wanting to like the Siglent; I really do. It seems so obviously to be the sensible option. But honestly, every time you all post screen shots of the Siglent next to screen shots of the Rigol, I feel like the Siglent is harder to read, as though I will constantly have to be peering closely to distinguish between one measurement and the next. Meanwhile, the Rigol screen seems vibrant, much easier to pick out salient numbers. Is that just my inexperience showing?
A "beginner that wants entry level 'scope" probably has no 200Mhz signals lying around anyway.
(I'm not even sure I do...)Rigol (unlocked to to 250 MHz) and applied 200 MHz signal to all enabled channels
Where's it written that people must do that?
(Be honest, do YOU do that...?)
Rigol UI is better for a beginner
A "beginner that wants entry level 'scope" probably has no 200Mhz signals lying around anyway.
I agree that the machine tool analogy proved to be less than helpful. It was intended to illustrate the different needs and perspectives of hobby users vs. professionals, but seemed to slide off into a discussion about size. Somehow, as a 63-year-old male, it always seems to come back to a debate about size ...
I keep wanting to like the Siglent; I really do. It seems so obviously to be the sensible option. But honestly, every time you all post screen shots of the Siglent next to screen shots of the Rigol, I feel like the Siglent is harder to read, as though I will constantly have to be peering closely to distinguish between one measurement and the next. Meanwhile, the Rigol screen seems vibrant, much easier to pick out salient numbers. Is that just my inexperience showing?No it is not you. The Siglent UI is more cluttered compared to Rigol's UI. Rigol has done a better job in that respect. Siglent's UI is copied from Lecroy's UI and not necessarily laid out very well. The aim is to cram as much information as possible in one screen without much thought for following good UI design guidelines.
honestly, every time you all post screen shots of the Siglent next to screen shots of the Rigol, I feel like the Siglent is harder to read, as though I will constantly have to be peering closely to distinguish between one measurement and the next. Meanwhile, the Rigol screen seems vibrant, much easier to pick out salient numbers. Is that just my inexperience showing?
Really? No risetimes[1] less than 2ns?
Digital signals from today's logic families easily have edges with much higher frequency content than 200 MHz -- even signals relevant for amateurs.
Regarding the "beginner/non-beginner" argument: any beginner stops being such very quickly, but the tool tailored for beginners (assuming it is) will remain such forever.
Regarding the "beginner/non-beginner" argument: any beginner stops being such very quickly, but the tool tailored for beginners (assuming it is) will remain such forever.
I wouldn't call myself a beginner but I'm happy with my Rigol.
I'm simply never going to connect four 200MHz signals to it.
(because I have no need to)
Regarding the "beginner/non-beginner" argument: any beginner stops being such very quickly, but the tool tailored for beginners (assuming it is) will remain such forever.
I wouldn't call myself a beginner but I'm happy with my Rigol.
I'm simply never going to connect four 200MHz signals to it.
(because I have no need to)
You don't need to.
Connecting four 1Hz signals with transition times <2ns is sufficient.
Really? No risetimes[1] less than 2ns?
Certainly not on an Arduino.
Atmega328 easily creates sub 1ns edges...
Atmega328 easily creates sub 1ns edges...
Not on a wire connected to the output of an Arduino Uno it doesn't.
Persistance isn't helping your argument.
If I need to measure rise times accurately I can use 1 channel. Not a problem.
And again: Is the Siglent's bandwidth enough? 200Mhz doesn't seem enough for the job you're proposing. Maybe get a Rigol MSO5000 instead.