Rigol DHO800/900 Oscilloscope Bug Reports + Firmware

[shapirus]

Since more than 100MHz don't really make sense on a 4 channel scope with 1.25GS/s

Of course it does. 250 MHz bandwidth is perfectly usable with one channel active, which is still a valid use case. Remembering the limitations with the sampling rate per channel being halved (and then halved again) when more channes are activated is then becoming the user's responsibility.

Yes sure it would be nice if the scope could apply filtering to limit bandwidth depending on how many channels are active (to avoid erroneous interpolation of undersampled high-frequency signals), but that sounds like asking too much from Rigol. At least everyone can choose their own poison.

[Fungus]

I had read (in the first weeks of the product's release) that attempts
 were made to unlock the features of the more advanced models.
But in the end I did not understand what is possible and what is not.

You can buy a DHO804 and tell it to be any model in the DHO800/DHO900 range. You get the bandwidth/memory of that model.

The only difference between 800/900 is the connector for the logic analyzer.

[Fungus]

Any recent development on such matter in the latest firmware?

Yep, they fixed about half of bugs and added some more.

They fixed all the important bugs.

What bugs did they add?

[Fungus]

Of course it does. 250 MHz bandwidth is perfectly usable with one channel active, which is still a valid use case. Remembering the limitations with the sampling rate per channel being halved (and then halved again) when more channes are activated is then becoming the user's responsibility.

... everyone can choose their own poison.

Yep, and it takes less than ten seconds to switch model/bandwidth.

(I just double-click a .bat file on my PC and it switches it via WiFi)

[riscy00]

I have new DHO924S scope and it on 1.02 FW, after playing around FFT, etc and decided to upgrade FW to 1.04 from Rigol website. Following the procedure to upgrade which was done, but Rigol screen stay Rigol, stuck there for infinite period and does not goes to scope app. I have tried power down and power up but no luck.
I'm looking to return it back for the replacement.  Anyone to suggest how to revert back to 1.02, I have no way to get into scope in order to get upgrade window.

[norbert.kiszka]

I have new DHO924S scope and it on 1.02 FW, after playing around FFT, etc and decided to upgrade FW to 1.04 from Rigol website. Following the procedure to upgrade which was done, but Rigol screen stay Rigol, stuck there for infinite period and does not goes to scope app. I have tried power down and power up but no luck.
I'm looking to return it back for the replacement.  Anyone to suggest how to revert back to 1.02, I have no way to get into scope in order to get upgrade window.

Two possible methods to fix boot problems are with network if it works and with removing SD card (after removing warranty sticker).

Also there is possibility that it wasn't software related, but it happened at a time of fw upgrade - especially if it's practically new (weak quality tests, if any at all).

[riscy00]

How to do network, what I need to do and procedure?

[norbert.kiszka]

How to do network, what I need to do and procedure?

Procedure begins with diagnostics. There is no magic one method for every problem. Also You need some experience with Linux and/or Android - otherwise You can spent months without success.

So I suggest to send it for repair or for money back.

[Fungus]

Try copying a firmware .GEL file onto a USB stick with name "HDO800_HDO900_Update.GEL" (name much be exact)

Also create a file on the stick called "force_update_sparrow.txt".

Put the 'stick in the 'scope and power it on, leave it for a few minutes.

It should install the firmware and "force_update_sparrow.txt" will disappear from the stick.

[shapirus]

I have new DHO924S scope and it on 1.02 FW, after playing around FFT, etc and decided to upgrade FW to 1.04 from Rigol website. Following the procedure to upgrade which was done, but Rigol screen stay Rigol, stuck there for infinite period and does not goes to scope app. I have tried power down and power up but no luck.
I'm looking to return it back for the replacement.  Anyone to suggest how to revert back to 1.02, I have no way to get into scope in order to get upgrade window.

Try to leave it turned on overnight and see if it boots by morning.

[iMo]

I have new DHO924S scope and it on 1.02 FW, after playing around FFT, etc and decided to upgrade FW to 1.04 from Rigol website. Following the procedure to upgrade which was done, but Rigol screen stay Rigol, stuck there for infinite period and does not goes to scope app. I have tried power down and power up but no luck.
I'm looking to return it back for the replacement.  Anyone to suggest how to revert back to 1.02, I have no way to get into scope in order to get upgrade window.

Try to leave it turned on overnight and see if it boots by morning.

So, do you expect the group of seven lovely dwarfs appear during the night, they will roll up their sleeves and repair the box?? 

Dwarf - (in folklore or fantasy literature) a member of a mythical race of short, stocky human like creatures who are generally skilled in mining, metalworking, electronics repair and software debugging..

[ebourg]

So, do you expect the group of seven lovely dwarfs appear during the night, they will roll up their sleeves and repair the box?? 

No he expects the thing blocking the boot sequence to eventually time out.

[norbert.kiszka]

No he expects the thing blocking the boot sequence to eventually time out.

Slight chance.

[shapirus]

I have new DHO924S scope and it on 1.02 FW, after playing around FFT, etc and decided to upgrade FW to 1.04 from Rigol website. Following the procedure to upgrade which was done, but Rigol screen stay Rigol, stuck there for infinite period and does not goes to scope app. I have tried power down and power up but no luck.
I'm looking to return it back for the replacement.  Anyone to suggest how to revert back to 1.02, I have no way to get into scope in order to get upgrade window.

Try to leave it turned on overnight and see if it boots by morning.

So, do you expect the group of seven lovely dwarfs appear during the night, they will roll up their sleeves and repair the box?? 

Maybe. Dwarves or not, but I've seen locked-up boots eventually resolve after a long (hours) wait on my scope.

[norbert.kiszka]

Maybe. Dwarves or not, but I've seen locked-up boots eventually resolve after a long (hours) wait on my scope.

Masochistic... Flashing SD card from backups takes 20 minutes with old SD card reader.

Also trying to fix it, gives some fun and knowledge.

[shapirus]

Masochistic... Flashing SD card from backups takes 20 minutes with old SD card reader.

This will not necessarily solve the issue. It might, it might not. My memory may be failing me now, but I think I tried that in my case.

As the original poster said, he was considering returning the scope, which implies that removing the SD card is not an option because of the warranty sticker.

Giving it a few hours to see if it eventually boots is a non-destructive operation, so why not.

[TheoB]

Using the latest firmware 00.01.04. Shows huge jitter when using AC coupling.
AC triggered:

DC triggered:

This is a signal with 18ns rise fall time. Happens on both edges.
Basically AC triggering cannot be used on this scope (depending on your jitter requirement). I will contact my seller, to see if they can forward the bug to Rigol. This should be on their radar as high priority I feel.

[ebastler]

Using the latest firmware 00.01.04. Shows huge jitter when using AC coupling.
This is a signal with 18ns rise fall time. Happens on both edges.

Basically AC triggering cannot be used on this scope (depending on your jitter requirement). I will contact my seller, to see if they can forward the bug to Rigol. This should be on their radar as high priority I feel.

Sadly, this bug has been known since more than a year ago:
https://www.eevblog.com/forum/testgear/rigol-dho800900-oscilloscope-bug-reports-firmware/msg5193855/#msg5193855
https://www.eevblog.com/forum/testgear/rigol-dho800900-oscilloscope-bug-reports-firmware/msg5193873/#msg5193873

[TheoB]

Yes same issue. Would be nice if the start topic would maintain a list of known issues. Something similar as for the DS1000Z. I guess Mr. EEVBLOG is not going to do that..

[iMo]

But this guy had none jitter..
https://www.eevblog.com/forum/testgear/rigol-dho800900-oscilloscope-bug-reports-firmware/msg5194833/#msg5194833

[ebastler]

But this guy had none jitter..
https://www.eevblog.com/forum/testgear/rigol-dho800900-oscilloscope-bug-reports-firmware/msg5194833/#msg5194833

Right -- I don't think the thread ever came to a resolution why that might have been the case. Maybe AC and LFR trigger coupling works when the scope remains set to Chinese language?

[iMo]

He hacked his 804 to 9xx something as there is the LA option, also had 1.02..
Perhaps worth to try that combo as well.. In EN..

[TheoB]

I have the jitter in 804 and 924 mode. That seems not related.

[DisasterPeas]

That symbol below the channel vertical scale/offset indicates you are in DC coupling in both screenshots you shared. Am I missing something?

[norbert.kiszka]

That symbol below the channel vertical scale/offset indicates you are in DC coupling in both screenshots you shared. Am I missing something?

Trigger has another coupling (see trigger menu). So You can see DC offset and have trigger in AC mode, so it's independent from DC offset. Sometimes it's incredible useful.