Rigol's New DHO800 Oscilloscope unbox & teardown

[Fungus]

as i said not all digital oscilloscopes can show laser rf... Just because there is persistence options it doesn't mean, that device can show laser rf correctly.

It has fancy triggering options, too. 

If you know what's needed then look for it in the manual.

my question was if someone tested DHO 800 series in that kind of use case and can confirm that it can show laser rf correctly

Hardly anybody has one yet so it's a bit early to ask that sort of question.

[2N3055]

It has fancy triggering options, too. 

Funny enough, Rigol made sure it has exactly the same trigger types as DS1000Z. No more or less..
Which is not a bad news because DS1000Z had very advanced trigger set for it's price. Very good, in fact, it was it's best feature.
But new entry level scope brings nothing new to the table, as some might be inclined to believe.

For classic CD laser "eye" diagram it will depend on how persistence is implemented and what waveform refresh rate is.  It will need to be tested to see. If refresh is good, trace should look close to CRT analog scope...

[Fungus]

change horizontal to 1.2, 1.3 s/div.

Well that explains why not many people have seen it. 

[svetlov]

hi,
Sorry for stupid question, but can Rigol DHO series 800 show/display laser rf signal correctly tike in example photo?
this thing is kind a challenge for some of digital oscilloscopes...

Yes, just turn on display persistence.

(and probably heat map as well)

no it doesn't work like that! -persistence will not give you almost any useful data that you can see on digital oscilloscopes where this function (digital phosphor) is implemented well!
in the Rigol DS1054-1102Z-E series, phosphorus simulation in some cases works even better than an analog oscilloscope (in fact, it’s amazing how they implemented this simulation so well without a separate DSP processor )
  imitation of analog phosphorus using digital methods should be a priority in the design of all modern oscilloscopes - this data area contains much more information about the actual signal

[Neutrion]

It has fancy triggering options, too. 

Funny enough, Rigol made sure it has exactly the same trigger types as DS1000Z. No more or less..
Which is not a bad news because DS1000Z had very advanced trigger set for it's price. Very good, in fact, it was it's best feature.
But new entry level scope brings nothing new to the table, as some might be inclined to believe.

For classic CD laser "eye" diagram it will depend on how persistence is implemented and what waveform refresh rate is.  It will need to be tested to see. If refresh is good, trace should look close to CRT analog scope...

I am waiting for someone to test the waveform update rate with full memory depth enabled. It was not really conclusive in Daves video. It seems to me to be much slower than the 11104x-e.
That is also interesting with the FFT, as Dave had the DHO800 showing it with only minimal memory enabled, while the 1104x-e with 7 or 14 Megpoints. So this was not a fair comparison of the screen speeds.

[dreamcat4]

well for waveform update rate, also nice to know if the dho1074 (or 4000 series) has a faster waveform updates. that can meaningfully show. and be demonstrated with something useful and practical situations. to see some justification if to spend more money to move up another tier.

[Serg65536]

Rigol DHO800 vertical zoom bias limit while stopped. Bug, issue.
It's impossible to look at 12 bit details on signals captured outside bias range of lower scales. Even in the zoom mode.
https://youtu.be/ANvczYUG8iU

[Kleinstein]

Rigol DHO800 vertical zoom bias limit while stopped. Bug, issue.
It's impossible to look at 12 bit details on signals captured outside bias range of lower scales. Even in the zoom mode.
https://youtu.be/ANvczYUG8iU

The same setting is used for looking at the stored curve also to possibly start a new capture. So it makes some sense to limit the parameter. If not they would have to change to value back to the limit when in run mode, which could also be confusing to the user.

I would consider this a more minor bug, though it would help to allow more offset in the hold mode.

[Malmen]

Rigol DHO800 vertical zoom bias limit while stopped. Bug, issue.
It's impossible to look at 12 bit details on signals captured outside bias range of lower scales. Even in the zoom mode.
https://youtu.be/ANvczYUG8iU

The same setting is used for looking at the stored curve also to possibly start a new capture. So it makes some sense to limit the parameter. If not they would have to change to value back to the limit when in run mode, which could also be confusing to the user.

I would consider this a more minor bug, though it would help to allow more offset in the hold mode.

So how do you zoom in on that signal then? I'm rather new to scopes so just trying to learn.

[Kleinstein]

It is indeed tricky to get the signal. There is a chance that the math function would work, though it is an odd detour.

[DavidAlfa]

Who had the great idea of posting a message inlining a 3MB 4000x3000 picture in it, and others quoteing it? 

[ebastler]

Who had the great idea of posting a message inlining a 3MB 4000x3000 picture in it, and others quoteing it? 

You are exaggerating, it's only 1.5 MBytes. 
Let's quickly write a few more posts so the offending quoted image moves to the prior page...

[DavidAlfa]

https://www.eevblog.com/forum/testgear/rigols-new-dho800-oscilloscope-unbox-teardown/msg5090119/#msg5090119

2.9Mbytes 

[ebastler]

https://www.eevblog.com/forum/testgear/rigols-new-dho800-oscilloscope-unbox-teardown/msg5090119/#msg5090119

2.9Mbytes 

But the inline image a few posts down is only half the size. 

Making progress with those extra posts to push the large images back into oblivion...

[Fungus]

Who had the great idea of posting a message inlining a 3MB 4000x3000 picture in it, and others quoteing it? 

Quotes don't matter. That's what browser caches are for... 

[Fungus]

So how do you zoom in on that signal then? I'm rather new to scopes so just trying to learn.

Don't pay any attention to these people, they're nitpicking this to death.

This 'scope zooms in far better than anything else out there unless you spend thousands of $$$.

(and even then it might not be better)

[Martin72]

This 'scope zooms in far better than anything else out there unless you spend thousands of $$$.

Have you already received yours and checked it against many different scopes or how do you know that for sure?
I know your enthusiasm/anticipation knows hardly any bounds, but wait and see before you lean out of the window like that.
(Unfortunately it looks like we still have to wait...)

[Serg65536]

Rigol DHO800 "vertical truncation is not updated while moving vertically" bug issue
Stop the acquisition, move waveform outside the screen, change horizontal position, or horizontal scale, or vertical scale. Move waveform back and it is truncated until you change horizontal position, or horizontal scale, or vertical scale again.
Firmware version 1.00
https://youtu.be/ZpYqQNpFG1g

[Fungus]

Have you already received yours and checked it against many different scopes or how do you know that for sure?

I'm going by Dave's video at 35:40:



And if we're honest, stopping a signal and THEN zooming in vertically by more than a click isn't something you'd really do on an 8 bit scope. You'd set the vertical scale first then push STOP. This 'scope brings whole new possibilities to the table.

[nctnico]

Have you already received yours and checked it against many different scopes or how do you know that for sure?

I'm going by Dave's video at 35:40:

And if we're honest, stopping a signal and THEN zooming in vertically by more than a click isn't something you'd really do on an 8 bit scope. You'd set the vertical scale first then push STOP.

Well, I've seen zooming in vertically working much better (with much higher magnifications) on other scopes (including using high-res on older Tektronix scopes) compared to what Dave shows  on the Rigol and Siglent.

[Fungus]

Well, I've seen zooming in vertically working much better (with much higher magnifications) on other scopes (including using high-res on older Tektronix scopes) compared to what Dave shows  on the Rigol and Siglent.

Yes, of course... but not at this price range.

The only reason I mentioned it is because these guys have at least one newbie worrying if there's something fundamentally wrong with these 'scopes compared to others.

How would you respond to that?

[Serg65536]

Rigol DHO800 XY mode, 80 kHz / 20 kHz +-0.3 Hz
Good picture, nothing to complain about.
https://youtu.be/lo74GgZyxT0

[tautech]

Have you already received yours and checked it against many different scopes or how do you know that for sure?

I'm going by Dave's video at 35:40:

And if we're honest, stopping a signal and THEN zooming in vertically by more than a click isn't something you'd really do on an 8 bit scope. You'd set the vertical scale first then push STOP.

Well, I've seen zooming in vertically working much better (with much higher magnifications) on other scopes (including using high-res on older Tektronix scopes) compared to what Dave shows  on the Rigol and Siglent.

Well that presumes Dave knows how to use the vertical Reference position settings found in Siglents.

[Fungus]

Rigol DHO800 XY mode, 80 kHz / 20 kHz +-0.3 Hz
Good picture, nothing to complain about.
https://youtu.be/lo74GgZyxT0

And again, the windowing ability looks awesome. 

[Serg65536]

No way to change any specific XY mode options: all are inactive (the user manual confirms this).
Rigol DHO800 "Bad apple" oscilloscope music file
Frame rate is not sufficient, the picture is not clear, some objects are blurred. Firmware 1.00.
Please, leave a comment if you know how to improve the picture.
https://youtu.be/R88DA15Iv8A