Hacking the Rigol DHO800/900 Scope

[BrokeEngineering]

My dho came and it's got a different psu and usb connector from any of the ones I have seen

[cte]

@BrokeEngineering: Has the USB-C receptacle on the device been changed to accommodate the locking mechanism?

[BrokeEngineering]

Yes, and has a tab for release

[ebourg]

@BrokeEngineering: Has the USB-C receptacle on the device been changed to accommodate the locking mechanism?

I don't think it was changed, there was already a hole on the side of the USB-C port for the lock.

[BrokeEngineering]

@BrokeEngineering: Has the USB-C receptacle on the device been changed to accommodate the locking mechanism?

I don't think it was changed, there was already a hole on the side of the USB-C port for the lock.

yes but the power supply that came with it, the USB C has the centering pin and the locking mechanism. Refer to first picture I posted

[RogerG]

This is just the PSU delivered with the new multimeter and the new AWG in DHO design. They always had the lock pin.

[BrokeEngineering]

Its what came with my DHO804

[Fungus]

This is just the PSU delivered with the new multimeter and the new AWG in DHO design. They always had the lock pin.

I think the pin was originally there because they supplied a 12V power supply with a USB plug on it and the pin meant you couldn't plug it into a 5V phone and kill it.

[iMo]

Hi, would you mind my asking you to confirm? Thanks!

Name: minimal_adb_fastboot_1.4.3_portable.zip
Size: 1195695 bytes : 1167 KiB
SHA256: e8a4428ce0bb405b0f657b72e120ed7ea36e295a047c068aec63071bf77fd916

Name: rigol_vendor_bin_824.zip
Size: 14277 bytes : 13 KiB
SHA256: bcec4179c4eff80111f7d273b6d67e52c5be53e94c72e8e73be9765c8df066fa

[NullSense]

Hey, I'm a new owner of a DHO804. Could you clear up some confusion regarding jailbreaking this model?

- Do I need to first upgrade to the latest firmware for DHO804 before installing firmware for another model (e.g. DHO824, 924, etc.)?
- What is the difference between jailbreaking to
    - DHO824
    - DHO924
- Simply doing the software license unlocks and keeping it the same model

[Mechatrommer]

install avast (free version if you tight arse) defender overridden, avast can be disabled at will and download any virus you want...

Avast on a Linux?

linux needs avast antivirus maa? i dont think so... i mean on (the hated) Windows... i mean if you install avast antivirus on Windows, your hatred will be gone.

[ebourg]

Hey, I'm a new owner of a DHO804. Could you clear up some confusion regarding jailbreaking this model?

- Do I need to first upgrade to the latest firmware for DHO804 before installing firmware for another model (e.g. DHO824, 924, etc.)?
- What is the difference between jailbreaking to
    - DHO824
    - DHO924
- Simply doing the software license unlocks and keeping it the same model

Technically there is no jail breaking, you are already root.

The BW7T10 option unlocks the 100MHz bandwith on the DHO804, but there is no option to unlock the 200MHz bandwidth, you have to change the vendor.bin file to DHO824 or DHO924 (but you'll still be limited by the 150MHz probes).

[NullSense]

Thanks. What is the difference between 824 and 924 vendor bin sideloading? The 924 has features like bode plots and the LA which won't be possible to use on the 804 I suppose? While 824 will give you 50MHz less (200 instead of 250)?

Additionally, is there a single source for these vendor bins for the latest firmware that I can find? (Not downloading random files off forum replies)

[ebourg]

Thanks. What is the difference between 824 and 924 vendor bin sideloading? The 924 has features like bode plots and the LA which won't be possible to use on the 804 I suppose? While 824 will give you 50MHz less (200 instead of 250)?

That's correct.

Additionally, is there a single source for these vendor bins for the latest firmware that I can find? (Not downloading random files off forum replies)

There is no single source, the file is generated specifically for your device.

[NullSense]

I was under the impression an arbitrary file can be generated with this utility (e.g. for 924, 824 models) https://github.com/zelea2/rigol_vendor_bin?

[AndyBig]

I was under the impression an arbitrary file can be generated with this utility (e.g. for 924, 824 models) https://github.com/zelea2/rigol_vendor_bin?

Yes, that's right. Except for 824 - the utility doesn't know this new model, because it hasn't been updated by the author yet.

[NullSense]

Thanks for the tutorial by the way, it's very helpful. Is there any drawback besides UI elements being unavailable going from 804 to 924 for example? Any benefits over using 924 instead of 824 besides the extra 50MHz?
It sounds like it would be more stable to do DHO824->DHO924.
I'm looking into the GitHub project to see if it's trivial to add DHO824 support, perhaps I'll make a PR.

Thanks again 

[shapirus]

Any benefits over using 924 instead of 824 besides the extra 50MHz?

Unlocking it to 924 is a well tested proven path.
The 824 mode is new. Not necessarily there will be issues, of course, but it has not been tested as extensively as the 924 mode yet.

[AndyBig]

Thanks for the tutorial by the way, it's very helpful. Is there any drawback besides UI elements being unavailable going from 804 to 924 for example? Any benefits over using 924 instead of 824 besides the extra 50MHz?
It sounds like it would be more stable to do DHO824->DHO924.
I'm looking into the GitHub project to see if it's trivial to add DHO824 support, perhaps I'll make a PR.

Thanks again 

In addition to the additional 50 MHz, the 924 also has a vertical limit of 200 µV (like the 914). The 824 has a minimum limit of 500 µV. I did not find any other differences

Forum participants have already added the 824 model to the utility from zelea2 - for MacOS, for Windows and for running it on the oscilloscope itself, I gave links in my message with an attached archive of the updated utility

[ebourg]

In addition to the additional 50 MHz, the 924 also has a vertical limit of 200 µV (like the 914). The 824 has a minimum limit of 500 µV. I did not find any other differences

Do you know if that applies only to the displayed scale, or also to the resolution of the measurements?

[AndyBig]

In addition to the additional 50 MHz, the 924 also has a vertical limit of 200 µV (like the 914). The 824 has a minimum limit of 500 µV. I did not find any other differences

Do you know if that applies only to the displayed scale, or also to the resolution of the measurements?

This is a display only scale, scaled from the 1mV/div scale.

[NullSense]

What is the point of this extra scaling if it's simply software scaling? You're losing data there I assume.

The rise time of the 924 seems to also be faster than other models, I suppose this is a hardware limitation, not software?

I reckon the extra 50 MHz also doesn't make a difference anyways if you're using the stock 150MHz probes . Sounds like the 824 is a better choice to not get the erroneous UI elements.

[ebastler]

What is the point of this extra scaling if it's simply software scaling? You're losing data there I assume.

If the "physical" resolution (determined by the pre-amplifier and ADC) is 1 mV/div, that's a bit more than 8 mV for the full 4096 ADC counts. So approximately 500 counts/div, more than the screen resolution.

The software-magnified 500 µV/div and 200 µV/div will let you zoom in a bit further, in theory to a level where ADC steps and screen pixels are on a comparable scale. Whether that's useful in practice or just lets you magnify the noise is another matter...

[NullSense]

Sorry, I'm a young player! New to scopes

[Fungus]

What is the point of this extra scaling if it's simply software scaling? You're losing data there I assume.

You have a 12 bit measurement ... it's measuring down to microvolts even though the front end amplifier is set to "1mV per division".