So to cut a long story short, consider the DHO800/900 with more than two channels active to be a 100MHz scope, and you are on the safe side.
That's obvious from the sample rate.If it makes much sense to spend the premium on the DHO924(S) can definitely be questioned. I probably wouldn't even apply a hack regarding the frequency upgrade if one should become available.
It's a 250MHz 'scope when there's only one/two channels enabled.
If you:
a) Work with 50 Ohm stuff and know to stick to two channels when doing that.
b) Need four channels for working with probes at other times.
Then ... it might be worth it.
For everybody else? Probably not.
Looking at screenshots from various scope brands on the web, they all seem to show color grading without putting intensity grading on top, and I think that is what you want for clarity.
Actually, I still like the intensity grading of the DS1000Z series better, not to speak of the higher models of this heritage...
Which does not rule out the possibility that some scopes may let you combine both grading modes, and their combined use is just never shwon in screenshots. Anyone with hands-on experience who can comment?
For clarity?.. it's a scope, you want "information", and whatever that can visualize that information, the better.
and what do you mean by "puttng on intensity"? it's a grading that scales the signal intensity' so you in fact get better clarity.
It's exactly what you want, for "clarity.
I do recall that mid to higher-end models, will often let you work with the intensity grading, also in color-corrected mode
A good intensity grading is a must for a modern digital bench scope, it would be a shame if it's not up to par with the latest Rigol entry DS1000Z series with 64 levels.
The problem here is that it seems that 16 or less levels are used to render waveforms.
Quick and dirty, intensity grading....looks very good.
But switching to color grade mode will deactivate the intensity adjustment.
For clarity?.. it's a scope, you want "information", and whatever that can visualize that information, the better.
and what do you mean by "puttng on intensity"? it's a grading that scales the signal intensity' so you in fact get better clarity.
It's exactly what you want, for "clarity.If I want to see frequent and rare signals, intensity grading will limit the dynamic range of "rareness": Very infrequent signals will become invisibly dim, or frequent signals will saturate. That's where I think color grading is most useful -- it lets the scope visualize that larger dynamic range on a color scale. But making the infrequent traces not only blue, but also very dim, seems to negate that benefit?Quote
I do recall that mid to higher-end models, will often let you work with the intensity grading, also in color-corrected modeWhat do you mean by "color-corrected" mode? Are we really talking about the same thing, i.e. false color or heatmap encoding?
If I want to see frequent and rare signals, intensity grading will limit the dynamic range of "rareness": Very infrequent signals will become invisibly dim, or frequent signals will saturate. That's where I think color grading is most useful -- it lets the scope visualize that larger dynamic range on a color scale. But making the infrequent traces not only blue, but also very dim, seems to negate that benefit?
For clarity?.. it's a scope, you want "information", and whatever that can visualize that information, the better.
and what do you mean by "puttng on intensity"? it's a grading that scales the signal intensity' so you in fact get better clarity.
It's exactly what you want, for "clarity.If I want to see frequent and rare signals, intensity grading will limit the dynamic range of "rareness": Very infrequent signals will become invisibly dim, or frequent signals will saturate. That's where I think color grading is most useful -- it lets the scope visualize that larger dynamic range on a color scale. But making the infrequent traces not only blue, but also very dim, seems to negate that benefit?
You seem to forget what I warned you about.
Scope should drop to 100Mhz (or 70MHz) BW if needed to prevent aliasing and show that on screen.
The specific comment you replied & commented on #40 - had two long videos of this exact feature, so not sure why you're unsure what we are talking about.
It goes under tons of different names & labels from vendor to vendor, some call it "heatmap" some calls its "color grading", some call it "Color Corrected Temperature" and some just label it as CCT, it goes under a lot of different names.
sorry! Long silent films where I am expected to stare at the screen and figure out what is happening and what the message is don't work well for m
Actually no-one (including MicSig) calls it "color corrected mode" or "color corrected temperature". "Color temperature
Looking at screenshots from various scope brands on the web, they all seem to show color grading ]without putting intensity grading on top, and I think that is what you want for clarity.
(*) Edit: Actually I can't find any documents where MicSig themselves use the "CCT" acronym or spell it out. The "correlated color temperature" meaning seems to come from a different discipline too, unrelated to false color scales.
The "noise signal" output of the "S"-Model's AWG appears to be very decent. The valley at 78.125MHz indicates the Nyquist frequency (due to a DAC sample rate of 156.25MHz = 1/8 Fs of the scope's ADC). Unfortunately, there's quite some amount of the sampling frequency leaking through to the AWG output (and it's not related to the scope section's ADC as I assumed in this contribution).
Considering these figures, I'm a little bit surprised that Rigol limited this AWG to 25MHz, the reconstruction filter and the other components appear to be laid out for a 50MHz AWG. Also the noise signal output appears to indicate this. So we may actually be up to a surprise eventually. For a "real" 25MHz AWG, I would have expected the reconstruction filter to be configured for a lower cut-off frequency with a steeper slope...
Btw, I like the handling and the speed of the scope's FFT along with the overall responsiveness of the U/I. That's quite an improvement vs. the "legacy" models. Once the problems are ironed out, this is going to be a nice instrument.
Which does not rule out the possibility that some scopes may let you combine both grading modes, and their combined use is just never shwon in screenshots. Anyone with hands-on experience who can comment?
Did you mean this effect??
Micsig STO2202C
Btw, I like the handling and the speed of the scope's FFT along with the overall responsiveness of the U/I. That's quite an improvement vs. the "legacy" models. Once the problems are ironed out, this is going to be a nice instrument.
Rigol MSO 5000 and Siglent models could do this.
The first I've shown here long ago, the second I could post it here in the later evening.
Btw, I like the handling and the speed of the scope's FFT along with the overall responsiveness of the U/I. That's quite an improvement vs. the "legacy" models. Once the problems are ironed out, this is going to be a nice instrument.
Also the windowing feature which nobody seems to mention. Having two full height signal displays without overlay (as shown above) seems like a huge benefit.
other manufacturers usually split screen horizontally, because X axis carries more details.
Which does not rule out the possibility that some scopes may let you combine both grading modes, and their combined use is just never shwon in screenshots. Anyone with hands-on experience who can comment?
Did you mean this effect??
Micsig STO2202C
Thanks! The attachments finally showed up now, after what appeared to be some forum glitch.
The first picture seems to use intensity grading to extend the color grading scale towards the low end: There's blue for less frequent signals, and dark blue for even rarer signals. That's a nice way of doing it, which I had not (consciously) come across before.
The other two pictures, at least to my eyes, show pure color grading: The information is in the color, I don't perceive additional information in intensity variations. That's what I had typically seen before.
All three pictures nicely illustrate what 2N3055 pointed out, namely that the "intensity" slider actually shifts the color scale in this mode. Which apparently it cannot do in the Rigol DHO models, since it gets disabled entirely -- that's a pity.
My preliminary takeaways regarding "grading" on the DHO 800/900 are:
- It does do intensity grading. Specified as 256 levels in the datasheet, looking good in screen captures on the PC (Martin72), looking less convincing on actual photos of the built-in screen (TurboTom).
- It does color grading. Looking alright if the fixed color scale is a good match (Martin72), but offering little or no flexibility to tweak it. Various other scopes offer more flexibility, notably among entry-level scopes the MicSigs.
QuoteYou can move the windows..
Like this...
Vertical view is on this tiny screen not recommendable(my opinion)..
Quoteother manufacturers usually split screen horizontally, because X axis carries more details.
You can move the windows..