Rigol's New DHO800 Oscilloscope unbox & teardown

[Fungus]

You could work for Apple. Any problem is always customer's fault

It also happens on Android: https://www.eevblog.com/forum/testgear/siglent-sds1202x-e-xy-mode-update-rate/   

[asmi]

My understanding is the PD spec still supports the 12V profile as optional. So charger manufacturers can choose to implement it or not. The minimum that must be supported are 5V/9V/15V/20V to be considered PD compliant, with PD 3.1 adding support for 24V/36V/48V.

I just got a new 65W PD charger last week that still supports 12V/3A. So they're still plentiful I think, you just need to check specs before you buy if you need 12V support.

Quite a number of USB-C chargers also support PPD, which basically allows sink to request just about any voltage and current. PPD is often used by modern phones and tablets for ultra-fast charging, so there are quite a lot of them in the 65 W range on a market.

[tautech]

You could work for Apple. Any problem is always customer's fault

It also happens on Android: https://www.eevblog.com/forum/testgear/siglent-sds1202x-e-xy-mode-update-rate/   

Oh that's a good thing Siglent DSO's don't run the Android OS. 

[duckduck]

My DHO804 showed up today.

First thoughts mirror Dave's:

It's small
It smells bad
Fan is too loud, but only somewhat annoying
It takes forever to boot
Touchscreen is cool
XY works great (fast refresh) - splitscreen is cool
"Quick" button for screenshots is brilliant

[mastershake]

any issues with the hack yet? I'm thinking about grabbing the 804 and doing the hack but I thought I saw someone talking about noise afterwards (cant find it now) any issues at all? should I get a 9xx model and start there VS the 8xx, but I think the 9xx is just black VS the white color or am I wrong?

[mwb1100]

I think the 9xx is just black VS the white color or am I wrong?

The 9xx includes:

  - logic analyzer connection  (but not the probe itself)
  - AWG hardware (for 9xxS models only)
  - 350MHz probes vs 150MHz (for 924/924S models only)
  - black (which many people seem to really dislike for some reason)

[thm_w]

any issues with the hack yet? I'm thinking about grabbing the 804 and doing the hack but I thought I saw someone talking about noise afterwards (cant find it now) any issues at all? should I get a 9xx model and start there VS the 8xx, but I think the 9xx is just black VS the white color or am I wrong?

Read: https://www.eevblog.com/forum/testgear/hacking-the-rigol-dho800900-scope/

[mastershake]

any issues with the hack yet? I'm thinking about grabbing the 804 and doing the hack but I thought I saw someone talking about noise afterwards (cant find it now) any issues at all? should I get a 9xx model and start there VS the 8xx, but I think the 9xx is just black VS the white color or am I wrong?

Read: https://www.eevblog.com/forum/testgear/hacking-the-rigol-dho800900-scope/

i did read that thread, so the hack is all good without issues then? safe to go ahead? that was what i was mainly afraid of i still have a hantek im trying to get going from bad firmware i dont want to deal with that again lol. adb is easy so flashing it should not be any issue.

[dmulligan]

Very few people have this scope in their hands yet so nothing is certain yet.

[mwb1100]

safe to go ahead? that was what i was mainly afraid of i still have a hantek im trying to get going from bad firmware i dont want to deal with that again lol. adb is easy so flashing it should not be any issue.

Stash the sdcard (or make a backup image of it).  Then no matter what goes wrong, pop the original sdcard back in and it's like new.

[Mechatrommer]

For use with the DHO900 (and hopefully the DHO800 after a few mods?) I've created a new v3.1 of the 16-channel LA clone board that is cheaper to make and easier to hand-solder:
https://climbers.net/sbc/clone-pla2216-logic-probe-analyzer/

make that clone probe, and then just add 25x2 2.54mm connector on the DHO800 PCB? is it that simple?

[ebastler]

make that clone probe, and then just add 25x2 2.54mm connector on the DHO800 PCB? is it that simple?

No, unfortunately not quite. The consensus seems to be that you also need to populate the two missing RAM chips, and maybe some other components? And cut open the front panel, of course.

[iMo]

Populating the two dram chips is not that dangerous (the drams are cheap, the soldering bgas is not that difficult, moreover you can remove the drams after an unsuccessful soldering easily) compared to the cutting the opening in the front panel 

[Mechatrommer]

cut front panel is easy, soldering bga is risky for me... so i'll leave it like that.. better not having LA than loosing the whole DHO...

[nctnico]

Yes. It also seems the MSO inputs go to the FPGA directly. If you let a wire with a decent amount of voltage touch the pins of the MSO input, you'll likely fry the FPGA.

[mikeselectricstuff]

Yes. It also seems the MSO inputs go to the FPGA directly. If you let a wire with a decent amount of voltage touch the pins of the MSO input, you'll likely fry the FPGA.

Makes you wonder how/if they pass EMC ESD immunity tests...

[dreamcat4]

sounds kindda awful then! ...not to put the buffer chips inside of the main case chassis. for those better input protection

[artur0089]

Should I get a 9xx model and start there

HDO1074...

[nctnico]

Yes. It also seems the MSO inputs go to the FPGA directly. If you let a wire with a decent amount of voltage touch the pins of the MSO input, you'll likely fry the FPGA.

Makes you wonder how/if they pass EMC ESD immunity tests...

Have a probe connected so the contacts are isolated is one way. I'm also not sure whether zapping contacts is part of ESD testing as you are not supposed to touch these with your fingers. For testing signals that are supposed to be connected, you typically perform surge tests. But I doubt the MSO input would survice such a test.

[dreamcat4]

it would make some sense to install a plastic plug cover onto the idc connector when not in use

[TimFox]

Is there a simple commercially-available cover that will fit that connector?

[mastershake]

a bit more then he wants to spend right now otherwise would be a possibility. looking to spend no more then around 500 or so on this one. he is new to this and still learning and i loaned him one of my siglents for now but he wants one for his home and office he can take back and forth and for the money these look awesome on paper i wish there was more info on the hack and longer term issues with these but they are still to new

[mikeselectricstuff]

Is there a simple commercially-available cover that will fit that connector?

An IDC ribbon cable connector with no cable. Maybe with some contacts remove to reduce insertion force, and a band through the cable path  to allow removal

[Serg65536]

It's really buggy in the stop mode. Waveform frequently disappears all the way through. It's hard to move and analyze signal.
Or is my scope broken?

PS: I've captured the most rough case.

[switchabl]

Makes you wonder how/if they pass EMC ESD immunity tests...

AFAIK they don't have to (at least in the EU). They would almost certainly apply EN 61326-2-1 ("sensitive test and measurement equipment") which mostly exempts test ports from immunity requirements. You'd still have to test ESD on connector shields (for example on BNC connectors) but not on inner pins.

Still, I don't exactly love this. A big unprotected IDC header on the front of a device aimed at education and hobby users, what could possibly go wrong?