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Sniffing the Rigol's internal I2C bus

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mauroh:
A big THANK YOU!! to all the guys that put all this effort to enhance our toys...
My new DS1074Z just became a wonderful DS1104Z with all Official options  :clap:

Gallymimus:

--- Quote from: SPRX on February 08, 2014, 11:06:57 pm ---Great work by the team working on this thread . . !!

It is time to upgrade my DS1102, and this thread is encouraging.

I may convince my pocket for DS4014 over DS2072A if it is really a good investment. I know the price of DS4014 is more than double + in import-duty bracket.

Could you please let me know if the DS4014 is upgradable successfully to 500MHz with options, if you have done an upgrade on DS4K.

--- End quote ---

Yes, DS4014 DS4000 series upgrades to 500MHz and options turned on using the keygens works great according to many people.

 Why don't you read the thread or search it so we don't clutter things up answering the same questions too many times.  I know it's a lot to read, but it's a small investment to cheat Rigol and save so much money.

tester42:
Hi everybody,

Thanks for a great job with these scopes!
I have just successfully turned my new DS1074-S into a 1104-S with all options enabled.
The firmware version is 00.02.01SP1. The signal generator is as expected still fully functional.

I'd like to add one thing about entering the Riglol code: The upgrade is not possible during the first 40hours of trial period.
You get a "Invalid Code" message during that time.

I have also found an interesting link about DIY probes  that might interest those of you with faster scopes:
http://koti.kapsi.fi/jahonen/Electronics/DIY%201k%20probe/

/tester42

pa3bca:

--- Quote from: pa3bca on February 09, 2014, 12:21:26 pm ---Rise time is abt 700 ps which would yield a bandwidth of 0.4/700x10^-12 = 570 MHz (which sounds a bit optimistic), but certainly way better than the original 70 MHz…

--- End quote ---
“a bit optimistic” is of course an understatement. But I am a bit at a loss as to how to interpret the rise time I measure with the pulse generator. It _looks_ like it meausere the whole pulse, so…
As a check I also tested my 5 year old OWON PDS7102T – a 100 MHz scope. Risetime measured was a bit above 3 ns (A bit difficult to measure, but not far off), resulting in 133 MHz.  Sounds reasonable. (see attachment). So this measurement seems to yield a more trustworthy result.
But: The OWON only rises to 12 Volts, whereas the upgrades 2072A rises to almost 40 Volts (both measurements with the pulse generator directly to the BNC, 1 meg input).
As a check I used the TG output of my 815-TG at various frequencies (0dBm output) and measured the Vrms reported by the scope. See 2nd attachment.
Note: the output of the 815 TG is not very well defined as we know, which explains the bumps and irregularities, but this measurement shows a bandwidth of just below 400 MHz. Sounds legit.
(nb: boy Am I glad I decided to buy the 2072 and not a new OWON.... ^-^ )

MatCat:
I just spent about 45 minutes going through this thread to try to find it but cant... I am considering getting the DS1074Z, and I am curious where is the info to actually hack it in this thread? :)   Also where is the best place to buy it over here in the US?

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