While not useful for your immediate task Bide plots are useful for filters, stop/pass band etc.
Or you can inject white noise and look at the FFT. Much simpler.
Yet another oscilloscope thread derailed by the eternal "FFT" discussion, even though it's stated as NOT a requirement.
Oh, I forgot to address one other point - a couple of times posters have mentioned that an 8-bit scope might be more than enough for my needs. Yes, very likely so - I'm open to suggestions!
There is literally no point in buying a new 8-bit 'scope now.
There is literally no point in buying a new 8-bit 'scope now.From Rigol or Siglent you mean. But there are many very valid choices beyond those brands!
Oh, I forgot to address one other point - a couple of times posters have mentioned that an 8-bit scope might be more than enough for my needs. Yes, very likely so - I'm open to suggestions!
There is literally no point in buying a new 8-bit 'scope now.
They're not cheaper, and they all feel like antiques compared to this new generation.
Oh, I forgot to address one other point - a couple of times posters have mentioned that an 8-bit scope might be more than enough for my needs. Yes, very likely so - I'm open to suggestions!
There is literally no point in buying a new 8-bit 'scope now.
They're not cheaper, and they all feel like antiques compared to this new generation.8 bit or 12 bit.. mehh.. ofcourse if its the same device 8 or 12-bit? it goes without saying that more bits are preferred.
But many other factors that are more critical in my book on a modern scope, beside bw/sr.
One criteria that I value highly, are a generally fast waveform update rate, and a decent amount of memory for all channels.
Also been quite fund of variable filters.
This can also be achieved with an appropriate RC combi.
The thing is... OP might get the idea from that the Rigol doesn't have an FFT, or it's somehow broken, which it isn't. It has a very good FFT and very simple to use.
Since you specifically brought that up: I'm afraid Rigol's FFT is broken in a few respects.
At least one of the window functions (Flattop, the important one if you want true peak heights) is wrong, resulting in nasty artefacts in the spectrum.
Nope. Digital filters in a DSO like the ones from GW Instek and MicSig (to stay within the same budget range) are much steeper compared to a single RC stage.
I did a little reading on Bode plots just a bit ago - I now see where they could be very useful in some circumstances. Am I correct in thinking that the "magic" of the DSO Bode plot is that it gives you the whole plot across the frequency range automatically? As opposed to measuring amplitude and phase shift at, say, a dozen discrete points along the frequency range, and creating a rough graph? (I may have just revealed how little I understood of what I read ... !)
and then here is Bode Plot with DHO804 testing simple RC filter...
Is removing the back panel required for Bode plot performance? 😉😉
Nope. Digital filters in a DSO like the ones from GW Instek and MicSig (to stay within the same budget range) are much steeper compared to a single RC stage.
Thanks for making me aware of these other brands. I had not seen / read anything on either brand until now.
The 12 bits and low noise is just icing on the cake.
I was with you up to "ENOB" - I confess that I don't have a clue what that is, nor what its significance is.
Fact that people write more on EEVBLOG about bugs of Rigol (or Siglent) than R&S is first and foremost because of price there is factor 1000x more Rigols and Siglent being bought by EEVBLOG community.
And R&S RTB2000 has 17 pages of revision history where full 3 A4 pages are enumerated bugs fixed.
Same with RTM3000.
So far what no one has mentioned in terms of usability is that the Siglent doesnt have wifi. I found a workaround so that the time stamp isnt 1969 all the time. Otherwise its great.
Works OK, but I need to get a better 1x probe than what came with the unit.
the choice probably doesn't really matter, so I let a few superficial things guide me instead.