Rigol DHO804 fw1.02 hacking - 250MHz bandwidth, 50Mpts, CAN and LIN decoding

[@pomonabill220]

Just received my DHO804 and did your hack! Worked GREAT! It now reports a DHO924 with 250MHz BW! Haven't tested it out yet, but wanted to let you know your instructions are flawless!!! Thank you.

[@EngineeringAllAround]

The issue is in a measurements precision. From a 0.5% precision instrument, you've converted it to ~2-5%! You can compare readings yourself: 1) check dc offset with no probes connected (you'll be surprised how huge it is) 2) connect a stable voltage source to all the channels and to a decent multimeter (you'll be surprised to see huge differences across the channels and compared to the multimeter)

[@dayworkhard]

I owned a Dho924s which has more ram installed and hardware components installed comparing to dho804. Though you installed the software of Dho924s, but the probing result might not be accurate.

[@JDW-]

LOL: "Haven't tested it out yet, but... your instructions are flawless!" Actually testing your scope will show whether the instructions (and your ability to implement them) are indeed "flawless" or not.

[@albert9402]

@@EngineeringAllAround Hello, I confirm the shift.

[@melovescotch]

Nice, so much easier to watch this than follow and figure out the forums!

[@ryanl890]

This still works on version 1.04

[@Robert.Czarnik]

Many thanks Mark! After watching, I'm looking forward to finally buy that oscilloscope.

[@albertosony]

Just did it to mine, thank you 🙏

[@NicksStuff]

6:07 ...can you retrofit it? Like, has the PCB provisions for the connectors and whatnot?

[@aaronchamberlain4698]

Theoretically yes. In eevblog's teardown, you can see the solder point for where the connector pins would go and a few other small SOIC-8 chips. Obviously you'd also need to cut up your chassis for the probe connector so it's a bit of a big ask. But theoretically, it's there.

[@NicksStuff]

@@aaronchamberlain4698 Thank you

[@svenpetersen1965]

I think, there is also a hack for upgrading the bandwidth etc. for the Rigol 1054. when I have bought my Rigol MSO4024, I had got the license files for upgrading the bandwidth and all the serial protocol decoding as a free extra with it.

[@TheRetroChannel]

Yeah the 1054 had similar hacks available. But I think rigol started including those features free of charge later in the 1054 lifespan

[@pedrobaco563]

Done! Thanks!

[@johne9430]

Is there a similar hack for the DHO802? Or the number of ports doesn't matter?

[@EngineeringAllAround]

6:27 HUGE ZERO OFFSET no way to calibrate this. This is common problem. Don't change scope model!

[@EngineeringAllAround]

From a 0.5% precision instrument, you've converted it to ~2-5%! You can compare readings yourself: 1) check dc offset with no probes connected (you'll be surprised how huge it is) 2) connect a stable voltage source to all the channels and to a decent multimeter (you'll be surprised to see huge differences across the channels and compared to the multimeter)

[@TheRetroChannel]

Yeah I noticed this after filming. Doing an auto calibration resolved it and it's been accurate since

[@EngineeringAllAround]

What avg offsets does your scope have now at 1mV vertical? Those errors could be hard to notice. What is the dc error now?

[@TheRetroChannel]

@sergivaschenko Average offset now is 220uV at 1mV/div

[@EngineeringAllAround]

@@TheRetroChannel that's HUGE, my unlocked dho804 (no model change) at 1mV has: -9.5, 24.7, 50.6, -22 uV; at 1V: -14.3, 5.72, -11.3, -5.5 mV

[@MD_Builds]

So apart from your model not having a logic analyser port, is all the hardware internally the same as the higher models? I was going to get a 900 series but if i can get a 904 and basically hack it to a 924 and save myself a few hundred quid... Because the features are simply locked behind software BS...?

[@diegodebrito3611]

Hi, i got a Rigol DHO804 and the Logo does not show and the screen is black but the device is running. do you know what i can do to get the screen to lit up please?

[@NicksStuff]

So, is that a persistant hack? Will the scope still believe it's a 900 series model after the next update?

[@JDW-]

@TheRetroChannel, I've been reading the comments by @EngineeringAllAround regarding the downside to hacking the DHO804 to a "different model." I myself implemented your older hack which unlocks new capabilities but keeps the DHO804 model the same: kzbin.info/www/bejne/d6ucnYuDfLuSoK8 I've not upgraded the firmware, so I don't need a new hack, but it might be good to release another video showing people how to do the "feature unlock" hack on the newest firmware, without changing the scope model, thereby avoiding the disadvantages mentioned by @EngineeringAllAround .

[@inviscid43]

Mine was delivered with 1.03, so I went ahead and upgraded to 1.04. Does anyone know if the older hack works with 1.04?

[@JDW-]

@@inviscid43I certainly do not know, which is why I am still using older firmware. 😢

[@docpaul]

sweet - will give this a go.

[@Colin_Ames]

Nice! I don’t have one of these ‘scopes, but it’s good to know that if I ever get one I’ll be able to hack it.

[@kka10001]

Hello Mark, after you did the first upgrade in the first video and all was well, had memory and bandwidth and it worked fine. Mine also worked fine, after updating the firmware to 1.2 all was fine still had memory and bandwidth like in your second video, But after I recalibrated it was all gone and still have 1.2. In your second video after the firmware upgrade to 1.2 never saw you do a calibrate, which on my scope removed the memory and bandwidth. Have you recalibrated after the latest. In short after the firmware upgrade to 1.2, memory and bandwidth still good until I did a calibrate

[@TheRetroChannel]

Ah, no I didn't do a calibrate after updating. I probably should do that, it's been a while

[@nickolastd21]

thanks

[@HN-lh9vs]

Could you provide a pointer to the procedure you used to install your launcher? TIA.

[@PrincipalAudio]

What does the bandwidth option actually unlock if my DHO-804 can already display 250 MHz signals? Does it allow higher zoom? Or is the amplitude more linear (removing software-controlled 70MHz filter)? Just curious. :)

[@TheRetroChannel]

From memory the max zoom on the 804 is 4ns/div, the hack allows for 2ns. Not sure if there is a software 70MHz filter, I don't have a reliable way to test both configurations. I just like hacking shit

[@PrincipalAudio]

@@TheRetroChannel Thanks! I suppose the hack is more than the bandwidth limit, so I guess I'm kinda splitting hairs after thinking about it a bit more. Thanks for your reply. Really appreciate it. :)

[@tonyfremont]

There is a built in hardware bandwidth limiter that will affect the displayed rise time of very fast signals and act as a low pass filter on frequencies above 70MHz.

[@PrincipalAudio]

@@tonyfremont Thanks Tony. Think I'll do the mod if I can. 👌

[@NeilsNonsense]

I believe the probes supplied with the DHO804 only rated for 150 MHz? That's why I've only done the option mod for 100 MHz. I was intrigued by the vendor.bin hack though. It would be nice to see a test on a 200 MHz signal.

[@TheRetroChannel]

True. I think people have done some tests with the original probes in the eevblog forum. I don't remember the results and finding them in that thread could be a challenge

[@tullyselengut7185]

thanks great video would you be able to make a video of how you hack the dp932e to the A version

[@D800Lover]

Right now I can't even update the firmware from 1.00 and tried via ethernet (it twirled forever) and downloading the file took many attempts but finally got there, but my DH0802 would not take either and just got an error message. A bit miffed about it.

[@D800Lover]

I still get the "red blob" and can't upgrade from 1.00 and so the whole thing is now mute, it is not going to happen and I have to live with the "red blob" forever.

[@khomouda]

Hi Mark when I am connected and try to pull I get adb: error: failed to get feature set: device offline what am I doing wrong, thanks

[@TheRetroChannel]

Did you see "ADB connected" after typing in the scope IP and port 55555? I'm no expert on using ADB so google or the eevblog forums may be of more help

[@Upper_Room_Studios]

Can you do a video on how to hack the Rigol 5000? The EEV blogs don't make sense to me. Too esoteric and vague. Also, could you upgrade this to a 924S model and have a signal generator?

[@MaDkawi636]

No, the S model has a daughter board installed to enable the sig gen functions which is missing on the non s variants.

[@TheRealHarrypm]

@@MaDkawi636 There has already been a clone of the AGW board still WIP from what I have seen but looks 1:1 with the current postings, will be trying this mod/upgrade at some point.

[@MaDkawi636]

@@TheRealHarrypm sweet... Links to the work?

[@TheRealHarrypm]

@@MaDkawi636 YT auto nukes, shoot an email and I'll get you the info...

[@simontay4851]

Is it possible to add the logic analyser hardware to the DHO804 so you can actually use the logic analyser function when hacking the SW to the DHO924?

[@TheRetroChannel]

I know some people were looking into it on the eevblog forums, not sure if anyone managed to successfully do it

[@RafaReig47]

El último paso me pone comando no válido y me quedo ahí he probado el resto de opciones y me dice lo mismo, sabrías que puede ser?

[@RafaReig47]

Solucionado , error mío

[@I_love_our_planet]

And i think when you use the pins on the mainboard and connect the LA Hardware it would work 🙂

[@sparkyindahouse]

these hacks work...but why make a somewhat accurate oscilloscope, inaccurate complete with a void warranty?

[@user-ns2qj5jo7x]

Hi, this hack is compatible with DHO802? Thanks!

[@Ozymandiuus]

Has anyone tried this with the 1.03 firmware version?

[@tony2707]

Can you reverse back to 804?

[@TheRetroChannel]

Should be possible by pushing the original vendor.bin file back to the scope

[@hansmoser162]

Thats so confusing for a noob with a DHO804... For FW 1.01 you need Golang and for FW 1.02 you need ADB? Why are you mixing this?

[@malarkey4441]

50Mpts memory depth do not work for me :(

[@TheRetroChannel]

Did you change the model to a 924 or use the unlock all options?

[@EngineeringAllAround]

From a 0.5% precision instrument, you've converted it to ~2-5%! You can compare readings yourself: 1) check dc offset with no probes connected (you'll be surprised how huge it is) 2) connect a stable voltage source to all the channels and to a decent multimeter (you'll be surprised to see huge differences across the channels and compared to the multimeter)

[@dariovicenzo8139]

Why?

[@EngineeringAllAround]

Those changes are not supported by the software.

[@shangrilai1990]

🍪

[@TheRetroChannel]

👽🍑👈

[@scaleartsg]

😂

[@309electronics5]

Lmao Features being software locked... Idk why they even bother locking them cause anyone with a bit of android knowledge (cause this definitely runs Android os) can easily enable those features. And the fact they leave Adb as an option in the firmware is just stupid

[@dotmatrix]

They’re not stupid. They are leaving the backdoor unlocked and looking the other way.

[@Gyaan_anant]

when i push vendor.bin it asking that it needs a argument what should i do?

[@TheRetroChannel]

Double check you typed it in correctly. Technically 'push' is the argument

[@Gyaan_anant]

Sir can you help me to hack my scope personally I will pay your fee whatever it will be.

[@Gyaan_anant]

Can you help me in hacking, because whatever i did but not able to hack it.i could pay your fee.