New Rigol 16-bit function generators DG800/900 series

[Luckygecko]

Maybe I am missing something, but if you have the DG811 with any firmware version, then upgrade to 2.04, then downgrade to 2.02 you end up with a DG992 with the original serial number...

What is the point of downgrading all the way to 1.08?

I've not read this whole mega thread, but Rigol either patched the firmware to 'fix' this model change issue or the firmware has a new private key so the 'magic' service USB trick no longer works on firmware later than 1.08.    With firmware 1.08 using the USB drive with the correct code in the right sector makes the unit that one is doing factory maintenance the best I can tell.  This allows commands not normally allowed.  One of them being the model change.  I would assume this allows Rigol or a service center to replace your main board and then set your orginal serial number and model to the replacement.  This way they don't have to make a board for each different model.   (it is also a cost savings at the factory/in design). 

Here is an earlier post:

I'm going to declare that the hack is closed or changed in firmware version 00.01.09.00.00
At least until the clever people can get hold of the firmware and take a look at it.
....

[Luckygecko]

I had a moment to try a USB Ethernet adapter.  Went to the 'junk' drawer and pulled one out. It had a USB C connector so I had to use an USB C to A adapter. Nevertheless, it worked.  Windows 10 gives it this information: (Realtek controller)


USB\VID_0BDA&PID_8153&REV_3000

Hope this is helpful.  I left settings at default.

[TK]

Maybe I am missing something, but if you have the DG811 with any firmware version, then upgrade to 2.04, then downgrade to 2.02 you end up with a DG992 with the original serial number...

What is the point of downgrading all the way to 1.08?

I've not read this whole mega thread, but Rigol either patched the firmware to 'fix' this model change issue or the firmware has a new private key so the 'magic' service USB trick no longer works on firmware later than 1.08.    With firmware 1.08 using the USB drive with the correct code in the right sector makes the unit that one is doing factory maintenance the best I can tell.  This allows commands not normally allowed.  One of them being the model change.  I would assume this allows Rigol or a service center to replace your main board and then set your orginal serial number and model to the replacement.  This way they don't have to make a board for each different model.   (it is also a cost savings at the factory/in design). 

Here is an earlier post:

I'm going to declare that the hack is closed or changed in firmware version 00.01.09.00.00
At least until the clever people can get hold of the firmware and take a look at it.
....

i started with a DG811 with 2.04. Downloaded and installed 2.02 as it is allowed by 2.04. My unit converted automatically to a DG992 with the original serial number. No need to patch anything

[Vtech]

i started with a DG811 with 2.04. Downloaded and installed 2.02 as it is allowed by 2.04. My unit converted automatically to a DG992 with the original serial number. No need to patch anything

Rigol hacked itself 

I assume that without all the steps (downgrading to 1.08, changing model and applying "finish upgrade") the model change won't survive firmware upgrade. Following all the steps you have permanent change - you can upgrade the firmware and the model will stay the same (DG992).

[tv84]

i started with a DG811 with 2.04. Downloaded and installed 2.02 as it is allowed by 2.04. My unit converted automatically to a DG992 with the original serial number. No need to patch anything

  And you think that's an achievement? You're downgrading...

I assume that without all the steps (downgrading to 1.08, changing model and applying "finish upgrade") the model change won't survive firmware upgrade. Following all the steps you have permanent change - you can upgrade the firmware and the model will stay the same (DG992).

You assume well. There's also the MODF way... 

[TK]

i started with a DG811 with 2.04. Downloaded and installed 2.02 as it is allowed by 2.04. My unit converted automatically to a DG992 with the original serial number. No need to patch anything

  And you think that's an achievement? You're downgrading...

I am not saying it is an achievement.  It all depends on your objectives... if you just want to have a DG992 with not the latest firmware (Rigol does not update it very frequently, anyway), this is the easiest path.  I tried applying 1.08 modified... but my unit kept at 2.04, the hack did not work.  Then I decided to downgrade to 2.02 and hack from there, but I realized the unit already was a DG992 with the original serial number... my objective was satisfied.  I will try installing 2.04 later today and see if it keeps the hack or not. 

[tv84]

I will try installing 2.04 later today and see if it keeps the hack or not.

Before trying that, run this.

[TK]

I will try installing 2.04 later today and see if it keeps the hack or not.

Before trying that, run this.

Installing directly 2.04 did not keep the hack.  Installed 2.02 back and device is DG992.  Installed SardineUpdateFinishUpgrade.GEL (it does not run like a valid install, it stays in the same state, asking again if I want to upgrade, does not reboot).  Then install 2.04 and it reverts to DG811.  It was the same symptom when trying to use 1.08 modified, it never installed.

[tv84]

Execute the procedure as listed by Vtech and it should work.

[TK]

You mean all the process described by Vtech from 0 to 5?

[tv84]

You mean all the process described by Vtech from 0 to 5?

Yep.

[Martian Tech]

A bit off the main topic of discussion, but just wondering if anyone else has tried operating one of these with an external timebase?  With mine, it runs OK for a while, then switches back to the internal timebase.  My source is a buffered OCXO, and the output voltage is within spec.  BUT I'm running 1.08 firmware - wondering if maybe upgrading to new firmware will fix it?

[dave3533]

Is there a preferred base model (eg, DG811, 812, etc) to attempt the model change/firmware update?

[tv84]

Is there a preferred base model (eg, DG811, 812, etc) to attempt the model change/firmware update?

Indifferent.

[TK]

Is there a preferred base model (eg, DG811, 812, etc) to attempt the model change/firmware update?

Indifferent.

The cheapest one

[tv84]

This script replaces the previous one and also downloads the calibration files so that people can analyse them.

[jscm2000]

Hello everyone!
My DG811 version is 00.02.04.00.00, and I upgraded to 992 according to the method provided by Vtech.
But the output voltage is very different. What is the reason?

[TK]

Hello everyone!
My DG811 version is 00.02.04.00.00, and I upgraded to 992 according to the method provided by Vtech.
But the output voltage is very different. What is the reason?

Did you add a 50ohm termination to the scope input?

[Martian Tech]

Hello everyone!
My DG811 version is 00.02.04.00.00, and I upgraded to 992 according to the method provided by Vtech.
But the output voltage is very different. What is the reason?

What is the bandwidth of your oscilloscope?

[tv84]

But the output voltage is very different. What is the reason?

Uncalibrated.

[Martian Tech]

Wait, back up - is the question why is the output not relatively flat across the frequency range, or why is it different than what was reported by timber23 in reply #199 of this thread (https://www.eevblog.com/forum/testgear/new-rigol-16-bit-function-generators-dg800900-series/msg2427906/#msg2427906)?

FWIW: I just checked mine (DG822 received w/firmware ver 1.08 -> Agilent DSO6034A 300MHz oscilloscope), and my results pretty closely match timber23's.

[jscm2000]

But the output voltage is very different. What is the reason?

Uncalibrated.

How to calibrate?

[jscm2000]

Hello everyone!
My DG811 version is 00.02.04.00.00, and I upgraded to 992 according to the method provided by Vtech.
But the output voltage is very different. What is the reason?

Did you add a 50ohm termination to the scope input?

High resistance，Not 50Ω

[jscm2000]

Hello everyone!
My DG811 version is 00.02.04.00.00, and I upgraded to 992 according to the method provided by Vtech.
But the output voltage is very different. What is the reason?

What is the bandwidth of your oscilloscope?

Oscilloscope bandwidth is 100MHz，DS1074Z ↑ DS1104Z

[tv84]

How to calibrate?

Not publicly known.