Rigol's New DHO800 Oscilloscope unbox & teardown

[Aldo22]

That's with some crappy automatic gain control maxing out the volume level.

Of course, it's difficult to judge the volume like this, but you can hear the pitch, which is somewhat in the annoying range of a small fan.
And it is obviously always spinning, not only when the device gets warm.

[Fungus]

And it is obviously always spinning, not only when the device gets warm.

Yep. It starts as soon as he hits the switch. 

I'm sure there will be some fan hacks for this. I'm thinking of a large external fan. There's plenty of ventilation holes and the heatsink covers everything so there won't be any hot-spots.

There's even some screw holes to mount things. 

[tv84]

I'm sure there will be some fan hacks for this. I'm thinking of a large external fan. There's plenty of ventilation holes and the heatsink covers everything so there won't be any hot-spots.

There's even some screw holes to mount things.

You haven't got the thing but you already are engineering a way to solve a manufacturer shortcoming.

Just remember that if this was with a Siglent all hell would break loose.    

Carry on.

[Fungus]

You haven't got the thing but you already are engineering a way to solve a manufacturer shortcoming.

Just remember that if this was with a Siglent all hell would break loose.    

Huh? Fan replacement is a universal thing across all brands. Siglent has fan mods, too.

https://www.eevblog.com/forum/testgear/siglent-1202x-e-noise-issues/
https://www.eevblog.com/forum/testgear/siglent-1104x-e-noisy-fan-replacement/

I'm just commenting that it looks very easy to do on these new Rigols.

It's something manufacturers should pay more attention to. I really don't think any home user would mind paying $10 more for a quieter cooling system, and these 'scopes are aimed at home users.

[mawyatt]

After watching the teardown of the other Rigol HD scopes by Dave and now this low cost HD scope, think Rigol should be complemented on taking the risk of developing a custom chip set! We know what's involved in this undertaking, and even if Rigol subcontracted this out (likely) they still had an enormous investment up front with enormous risks.

Think we are seeing fruits of Rigol's custom chip set investments, and for these to prove out financially they must utilize a very large number of these chip sets. Here we're likely talking 100,000 or more of these chip sets, and thus they need to find many products to utilize such, one of which is this new low cost HD scope!! From what we know Rigol is the only second tier OEM to support a custom DSO/MSO chip set, putting them on par with Keysight, Tektronix and LeCroy (maybe R&S) regarding such.

Hopefully Rigol will do an equally good job as they've done with the custom chip set with the firmware and UI. So far the UI is very attractive but seems riddled with bugs in the early releases, which many have indicated may have been released a little too early.

Anyway, interesting times for us lab rats

Best,

[Fungus]

Hopefully Rigol will do an equally good job as they've done with the custom chip set with the firmware and UI. So far the UI is very attractive but seems riddled with bugs in the early releases, which many have indicated may have been released a little too early.

You have a list of these "bugs"?

[Njk]

You have a list of these "bugs"?

Where's the full screen button? Noticeable disadvantage. 7'' LCD and no way to make the picture full screen.

[voltsandjolts]

I'm just commenting that it looks very easy to do on these new Rigols.

Ahh, you mean that's what the VESA mount is actually for - mounting a fan that doesn't drive you insane.

Are VESA mount fans a thing yet? 

[icb]

Are VESA mount fans a thing yet? 

3d printed VESA mount PC fan adapters are https://www.printables.com/model/319657-120mm-fan-to-vesa-mount-adapter

[Njk]

I don't think there can be any noise issue. Simply because it's not a rack-type equipment, too little metal parts inside to resonate. Anyway, it seems pure european issue. In NA (the primary market) the folks are accustomed to loud hiss in the living room from air conditioner, it's considered normal. That subtle fan can't make any difference.

[mawyatt]

Hopefully Rigol will do an equally good job as they've done with the custom chip set with the firmware and UI. So far the UI is very attractive but seems riddled with bugs in the early releases, which many have indicated may have been released a little too early.

You have a list of these "bugs"?

Sure start reading this thread and the others related to the new Rigol HD DSOs, document each issue and post back here and we'll all grade you

Best,

[Martin72]

3d printed VESA mount PC fan adapters are https://www.printables.com/model/319657-120mm-fan-to-vesa-mount-adapter

Makes little sense, that would be like putting a fan behind the scope.

[EEVblog]

That's with some crappy automatic gain control maxing out the volume level.

Of course, it's difficult to judge the volume like this, but you can hear the pitch, which is somewhat in the annoying range of a small fan.
And it is obviously always spinning, not only when the device gets warm.

Yes, always on, and winey. Not that loud, but noticeable. The DS1054Z is louder but has a low frequency.
The Siglent 1104X-E is slightly lower and sounds like a broader but lower frequency response.

[Martin72]

Here is a simple fan mod:

Work a single day with a Lecroy Wavejet scope.
After this every other scope seems not to have a fan on board...

[mawyatt]

That's with some crappy automatic gain control maxing out the volume level.

Of course, it's difficult to judge the volume like this, but you can hear the pitch, which is somewhat in the annoying range of a small fan.
And it is obviously always spinning, not only when the device gets warm.

Yes, always on, and winey. Not that loud, but noticeable. The DS1054Z is louder but has a low frequency.
The Siglent 1104X-E is slightly lower and sounds like a broader but lower frequency response.

Talk about loud annoying fans, the Hioki IM3536 LCR meter sounds like a damn jet engine, and this is normal

Often can't use this meter as it annoys the family, and they are in another room, it's that bad

Best,

[Fungus]

You have a list of these "bugs"?

Where's the full screen button? Noticeable disadvantage. 7'' LCD and no way to make the picture full screen.

How is that a "bug"?

[Nikki Smith]

I bought a GHO924 and disassembled it without damage

Many thanks! So those 2x DRAMs needed for the logic analyser are GigaDevice GDP2BFLM-CA, 96-ball FBGA:
https://www.gigadevice.com.cn/Public/Uploads/uploadfile/files/20230704/DS-00823-GDP2BFLM-Rev1.1.pdf

Edit: is this extra memory needed for the 50Mpts sample depth of the 900 models, or for the logic analyser, or both?

[Nikki Smith]

The AFG for DHO9x4S is a pluggin module.The LA port is directly connect to the main fpga.
The other component looks all populated,
so DHO800 uphack to DHO900 may need to solder up two drams and LA port only and flash the system?

Do you have any more information about the AFG module? Thanks!

[Nikki Smith]

I bought the original logic probes for my scope a few weeks ago.
I felt as if I had purchased a gold bar, in terms of price.
Promptly came reactions a la "I had bought the clone, for 40 bucks." (aha...good for you)
Surely there will be something like this for the DHO900, the socket on the scope looks like it is the same as on the MSO5000.

Do you know if anyone sells those PLA2216 LA clones? I've seen a few design files on the forums, but no one selling a ready-soldered board (in 2023). Can't find any clones on ebay.

@Gandalf_Sr https://www.eevblog.com/forum/testgear/ms05000-budget-logic-analyzer-probe-set-design/msg2978274/#msg2978274
@S. Petrukhin cheaper design https://www.eevblog.com/forum/testgear/low-cost-logic-analyzer-probe-for-rigol-mso5000-easyeda-project/
@Peter_the_diver modified from Petrukhin's design https://eltguy.de/en/selbstbauprojekte-elektronik-technik-hobbytechnologien/logic-probe-ein-digitaler-16-kanal-tastkopf-fuer-oszilloskop/

Edit: found some clones on ebay.com (but not .co.uk) at around US$80 including test clips and 3D printed tray.

Thanks

[Warhawk]

Guys, is the HDO and DHO series from Rigol same? I am bit confused.

E.g. HDO1204 vs DHO1204

https://mall.rigol.com/item.html?item_id=1427
https://mall.rigol.com/item.html?item_id=1484

[Nikki Smith]

Guys, is the HDO and DHO series from Rigol same? I am bit confused.

I think they had to change the name to DHO for legal reasons, so their website still has the original names as product pages?

[wasedadoc]

Guys, is the HDO and DHO series from Rigol same? I am bit confused.

E.g. HDO1204 vs DHO1204

https://mall.rigol.com/item.html?item_id=1427
https://mall.rigol.com/item.html?item_id=1484

Yes, model names changed from HDO to DHO.

[RAPo]

Not only looks like MSO5000, but according to the datasheet, the PLA2216 is the probe to use 
(and indeed a bar of gold feeling  )

I bought the original logic probes for my scope a few weeks ago.
I felt as if I had purchased a gold bar, in terms of price.
Promptly came reactions a la "I had bought the clone, for 40 bucks." (aha...good for you)
Surely there will be something like this for the DHO900, the socket on the scope looks like it is the same as on the MSO5000.

[Aldo22]

Guys, is the HDO and DHO series from Rigol same? I am bit confused.

E.g. HDO1204 vs DHO1204

The thread for these models is here:
https://www.eevblog.com/forum/testgear/rigol-hdo1000-and-hdo4000-12bit-oscilloscopes-launched-in-china/msg4576036/#msg4576036

[franciscoPT]

I want to buy a new osciloscope i was going to buy the rigol mso5074 but now that this scopes came out im not sure, what you guys think about the diferences between both? i know there is still not a lot of information but i dont know if i make use of the 12 bits resolution.