Rigol's New DHO800 Oscilloscope unbox & teardown

[nctnico]

I bet that in the position with the "yellow-circumlined cap", an inrush-current limiting NTC was supposed to be installed. Since the OEM's ECAD probably doesn't provide a resistor in that form factor in the library, they just used a replacement from the caps library...

I agree with this. Likely they left a spot open for an inrush NTC.

[hubertyoung]

I bought a GHO924 and disassembled it without damage

[hubertyoung]

Just received a new power supply yesterday, yes he is from Lenovo

[Azusa]

Hey hubert,Could you share vendor.bin in your device?It determined the model of device.
You can connect the device to adb by network on port 55555. and "adb pull /rigol/data/vendor.bin"
I want push it into my DHO804 and find out how DHO800 uphack to DHO900.

[hubertyoung]

Hello Azusa, I can give it a try tonight. I am an Android application development engineer, and I believe I can do it. Tonight, I plan to diy a cheap PLA2216 and try to expand the range of voltage usage.

[hubertyoung]

Hello, I have successfully saved the vendor.bin file. What else can you do to help?

[Azusa]

Thank you,hubert.
My DHO804 is DHO924 now.
Two extra drams are only for LA.It can be unpopulate if doesn't use the LA .
The bandwidth is increased successfully.it has 800ps rise time now.
And the memory depth is 50M now.

[slavoy]

Did you measure the temperatures? How about the fan noise?

[Fungus]

Did you measure the temperatures? How about the fan noise?

Yeah, tell us about the fan... 

The images are messed up on the first page. When I click on the thumbnail of the heatsink I get the image for "heatsink removed".

If I zoom in on the thumbnail I see a huge heatsink with a tiny fan in the middle. There's a lot of vents on the back so I'm hoping it's temperature controlled and never even turns on in normal use.

[Azusa]

All photos are fixed.
I tried playing Genshin game on it for hours.The SOC is full loaded.
And the acquisition is running at the background. The temperature was fine.
The noise of fan is quitely low.

[Azusa]

At the front,BNCs are 48 degree,other is about 40 degree.
On the back,the heatest is the heatsink inside near the fpga about 58.9 degree with hours gaming.The fan speed is fixed.
The back case is about 40 degree average,and the BNC still be heatest.

[rf-loop]

Please, what are explanations about this "ultra" high noise what is visible in this image (nothing connected to inputs)

[zrq]

Do you have a picture of playing Genshin on the scope? 

[Azusa]

Please, what are explanations about this "ultra" high noise what is visible in this image (nothing connected to inputs)

Sorry,I'm forgot to say,this noise is because i bypass the LC fliter to test maximum bandwidth and forgot to place it back.
but it is nothing by default,The LC fliter is about 300MHz cutoff.
here is a photo from a group,somebody tested the file on his dho804 without any circuit modify.

[Fungus]

Sorry,I'm forgot to say,this noise is because i bypass the LC fliter to test maximum bandwidth and forgot to place it back.

It's easy to forget. 

[Azusa]

Do you have a picture of playing Genshin on the scope? 

At reply #84.
and it even can split screen

[Martin72]

Split screen mode...Wow.
Just wow.

[Fungus]

and it even can split screen

How did you do that?

Can you load Android APK files on it?

Split screen mode...Wow.
Just wow.

I declare the game officially changed again by Rigol.

[Martin72]

In any case, it's a worthy successor to the DS1000Z series, but we'll know everything else in October.

[Azusa]

and it even can split screen

How did you do that?

Can you load Android APK files on it?

Split screen mode...Wow.
Just wow.

I declare the game officially changed again by Rigol.

It's no desktop access by default like DHO1000/4000.The built in launcher is for startup its scope app only.
You can install a gesture app and nova luancher then startup it by adb.
Setup gesture service and set nova launcher as default then you have desktop access.
You can install any app which Android 7 supported by adb.

[Fungus]

If ADB works then the hackability of this is going to be huge.

The other thing I was wondering is does it support a mouse as standard?

[Azusa]

If ADB works then the hackability of this is going to be huge.

The other thing I was wondering is does it support a mouse as standard?

Of course.

[Fungus]

The other thing I was wondering is does it support a mouse as standard?

Of course.

I was sure it would... 

[nervdg]

Thank you,hubert.
My DHO804 is DHO924 now.
Two extra drams are only for LA.It can be unpopulate if doesn't use the LA .
The bandwidth is increased successfully.it has 800ps rise time now.
And the memory depth is 50M now.

Hi Azusa,Could you share "DHO800_DHO900_Update.GEL" of your device,It's firmware under /rigol .I have some problem while try to hacking DHO804 to 924 using Hubert's vendor.bin,after replacement it was successfully recognized as DHO924,bandwith increased.But there was Y axis drifting(±(5-10)mv) can not be eliminate by SelfCal.the hardware seems to be identical,the only difference was firmware version,mine is 00.01.00(2023/7/21) which diffeent from yours(00.01.14 2023/07/06),i want to downgrade to your version having a try,Thanks.

[Azusa]

https://1drv.ms/u/s!AkhYvp-r_jl5jU-ppDFHwT9WcShf?e=A7y1v1

DHO800_DHO900_Update.GEL