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Hacking the HDO1k/HDO4k Rigol 12 bit scope

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sizziff:

--- Quote from: zrq on March 27, 2024, 10:24:57 am ---I don't have a perfect solution (still no time to look in to the 50Ohm gain problem),  but this accounts for what I did: https://www.eevblog.com/forum/testgear/hacking-the-hdo1khdo4k-rigol-12-bit-scope/msg5247882/#msg5247882

I have confirmed the hackable bandwidth for a HDO1074 is indeed more than 500 MHz.

--- End quote ---

Thank you for your reply, obviously you have done a great job. But I don't have the competence to get into the source code, can you share the finished binary file?
Or maybe you can make a more detailed instruction(not in all the details, but at least the main steps)?

TurboTom:
After the findings of the effect of H/W configurations in the DHO800/900 thread, I thought I'ld have a closer look at the DHO1000 hardware configuration - albeit, as I can preemptively already report -- with little further success, but at least with some knowledge gain...  ;)

Since there are no "rear side" photos of the DHO1000 PCB available yet, I took some and added them to this post. There are four resistors that apparently code the H/W version in a binary manner. I hoped for a possibility that the configured H/W may affect the function of the 50 Ohms input relays, but I had to find out it doesn't. Instead, when I changed my H/W version from originally 2 to 0, I wouldn't get a trace on the screen anymore. The scope shows its trigger status as Auto / Run but no trace whatsoever on any channel. Obviously, I returned the configuration back to 2.

Another interesting detail is that the parts not populated on the 1000 vs. the 4000 variety of Rigol's scope are not only limited to the "accessible" side of the PCB, but there's also a lot of stuff missing on the "rear" in the second ADC's vicinity.

Moreover, I found it very difficult to remove the H/W config resistor (10kOhm) -- even 400C hot air for a considerable time and a decent flow rate wouldn't do the trick for me, and I didn't want to go any hotter. It seems there's so much copper planes in the inner layers of the PCB that it conducts the heat away very quickly, and the lead-free solder also doesn't help to ease things up. Finally, I used the "iron" to work on the config R which turned out okay. But this shows that a "serious" modification (i.e. adding the missing ADC, PSU and decoupling stuff) woud require really decent SMD rework tools -- a simple hot air station probably won't be enough unless one would be going high-risk...

Some more details / findings, yet not documented in photos:
- The metalwork of the scope provides orifices for one more USB host, two BNCs next to them and then a place for Rigol's passive logic (MSO) probe connector. There are no such counterparts prepared in the plastic front.
- There are provisions for three more pushbuttons (even equipped with LEDs already) above the "Math" button.
- I found the input BNCs not to be fixed to the front metalwork with nuts (on my specimen). This eliminates the need to remove the whole chassis from the plastic front when removing the PCB, but puts all stress on the PCB when attaching/removing probe connectors. The heat sink with its many screws supports that area pretty well but I'll still remember to be more carefull when I attach a probe with a massive compensation box like Tek's P6015... I'm not sure if it's the same for the DHO4000 with it's additional probe detect/power PCB where bigger probes are expected to be attached.

So unfortunately, no progress with a "Hack", but at least some information gained...  :-//

Cheers  ;D

mrisco:
Anyone tried this: https://github.com/mriscoc/RIGOL_DHO800_DHO900_GUI/releases/latest in the HDO1k/HDO4k?

dave2:
Hello everyone, I am new here so apologies if I missed a post with content similar to my problem. I am a hardware engineer not a softie

I bought a DHO1074 a few months ago as I was looking for something small and a bit more up to date than I had.

I noticed a few things that were not as expected and  so came across this forum thread and thought I would try unlocking my scope with the aid of the brilliantly written tutorial.

When I received it, I installed the latest firmware. I successfully connected using a wifi adapter (I had to drop the ./ at the start of the command).  The problem I have is when I retrieving the key data. Opening the file it contains Chinese characters.
I tried a second time with the same result. I hope this is not a an anti hacking strategy but an error on my part.
Thanks for your help.
Dave

 

skander36:
You don't need to open that file. It has be in the same folder with the script file (rgtool.go). Read again the hack method.

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