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Sniffing the Rigol's internal I2C bus

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nmz787:
This and the subsequent post mention an offset that self-cal doesn't fix:
https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/msg346806/#msg346806

I plugged the signal generator into the input, and indeed with 0mV offset on generator and 20mV PP, you can easily see the signal isn't centered on 0 (not just in 500uV mode either).

Edit: I've got a DS1104Z

alank2:
nmz787 - use the scpi uninstall command (somebody posted a tool to do this not long ago) and then reboot your scope.  Then reinstall a new key without the 500uv option.

RX_Buffer[Broken];:
Hi All, (noob)

I have been watching the DS2xxxn topic for a few weeks , I have Z's Patched F/W on a what was a 2072A.  "Nice Job Z"
However not wanting to turn up to the party empty handed (linux, Jtag & sharing Dumps are not my redeeming features) So I have been investigating other routes.

I have found a DS2xxx  SCPI command that appears un-documented and may be of interest if still supported in f/w.
Having tried on my own unit I get a buss time out error, maybe patched F/W or maybe that all options are already installed, unsure??
It would be interesting to know what reply you get from a standard unit? or if anyone already knows about this CMD already ?

SYSTem:OPTion:VALid?



MrsR:
Hi! Guys,
I am having problems with my RIGOL 2072 DSO modified to 300MHz.
Is there a way to turn it back into a 70 or even a 200MHz model.
I used the 3owl site.
The fault is that I get  screen messages "Parameter out of Range" when I know it isn't.
I did the same tests with works AGILENT scope no problems.
Also I can't put it into Peak Detect well I can but on using, it jumps to Normal.

Thanks Guys
Rachael :-+

AndersAnd:

--- Quote from: MrsR on January 31, 2014, 11:50:55 pm ---Hi! Guys,
I am having problems with my RIGOL 2072 DSO modified to 300MHz.
Is there a way to turn it back into a 70 or even a 200MHz model.
I used the 3owl site.
The fault is that I get  screen messages "Parameter out of Range" when I know it isn't.
I did the same tests with works AGILENT scope no problems.
Also I can't put it into Peak Detect well I can but on using, it jumps to Normal.

Thanks Guys
Rachael :-+

--- End quote ---
Yes just use the SCPI uninstall command as mentioned several times in this topic.

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