Quick GuideFlash the rigol-key.img from the attached zipfile to a USB drive using your prefered disk imaging software. (dd/Win32 Disk Imager)
Power on the device, and insert the thumbdrive
Send the SCPI command to change the model number:
--For the DP800 series--
:PROJ:SET MODEL,DP832A
--For the DG1000Z series--
:PROJ:STAT MODEL,DG1062Z
You can then unlock the Arb16Mb option with this command as well, it will show as trail, but will never expire. (This sets your serial number to DG1ZA000000000, you can revert this by replacing the string with the serial found on the back of your unit, if you have need)
:PROJ:STAT SN,DG1ZA000000000
--For the DL3000 series--
:PROJ:SET MODEL,DL3021A
Reboot the device and you should be done.
Rigol's Ultra Sigma and the IVI drivers it provides have always been very flaky for me, so I used Messinstrumente with Zadig USB drivers
http://peter.dreisiebner.at/messinstrumente/Messinstrumente_2019-06-14.ziphttps://zadig.akeo.ie/downloads/I wanted to make a quick recap as this thread has gotten pretty long and it actually took me awhile to sort out some of the details and find the original posts that had the relevant information.
I also had trouble with Rigol's Ultra Sigma when trying to issue the SCPI commands, and ted572 (Thank you!) had made a suggestion to use Messinstrumente, and that worked immediately with no issue after installing the Zadig USB driver for the device.
I'm including the rigol-key.zip with this post for ease of download, but credit must go to tossu
https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/msg2475702/#msg2475702A huge thank you to volkimel, tv84, tossu for making this hack happen.