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Sniffing the Rigol's internal I2C bus

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asrc1978:

--- Quote from: Mark_O on February 14, 2014, 11:51:20 pm ---I don't recall that anyone has ever reported that having all 3 BW's listed actually caused any operational problems?  Just uses a bit more screen space, in the list.

I.e., the scope isn't "confused" about it's "true identity", and behaves improperly.  Does it?

I'm just wondering why people care, unless there's a functional disadvantage I missed reading about.  Always a possibility in this thread.

(And yes, I'm aware of the potential issues that can arise, simply by enabling 300 MHz.  And thus why it's not recommended.)

--- End quote ---

Hi Mark,

I can tell you that the hardware is the same for 70MHz, 100MHz, 200MHz. In the new models (DS2xxxA) the only one difference is the selectable input impedance (between 50ohm and 1Mohm) and this only to improve the measurement at high frequencies (in the case of DS2303A at 300MHz). In this case the hardware is Rev. 2.

At the end of the day is the same, you can use hardware to achieve BTW of 300MHz using a inpedance of 1Mohm with certain disadvantages in the measurement.

Thanks.

BR.

Seba.

sacherjj:

--- Quote from: sacherjj on February 14, 2014, 12:48:00 pm ---Thanks for the heads up. Just submitted a request in highly efficient and easy to use Rigol firmware update retireval system.  ;)

Just realized that my sarcastic post about getting updated Rigol firmware is post 666. Yeah seems appropriate.

--- End quote ---

Guess I need to take up for Rigol service, after my snide comment.  Less than 24 hours after asking through the form, I had both DSA815 and DS4k series firmware updates.  Not as good as downloading from a site, but not terrible.  Although, from the future I'll just download from the EEVblog firmware repository.  That seems simpler.   :-+

ch.onillon:
really really excellent this blog ... i never heard about rigol oscilloscope before but since i know we can upgrade it so easilly i want buy the 2072 ... and now up to 300 MHz , it s a must to have. i think since rigol won in delivery ..

the most difficult is now to follow allthe post on this thread .....
i learn Every days on this site.
 
next buy ? one 2072 of course :-)

menkelis:
Just wanted to say that because of the high level of excellent information in this blog
I just purchased a 2072A (with $50 discount) from TEquipment.

I have been a long time Tektronix user (and ex employee) and was quite impressed
with the comments made. I can also say that the option of 'unlocking' extended options
fits in very well with me, as this is something that even Tek did/does with common hardware.

So now my two Tek digital scopes (222 & 224) have been donated to the Vintage Tek museum
where I volunteer as there IT  administrator.

NYG:
I bought a DS2072A myself and just received it a few days ago. I really wasn't sure if I should get this or the DS1074z. I'm just a hobbyist getting back into it again. I dusted off my old TWD120 the other day and was surprised the windows '98 laptop that controls it still worked.

In any event the scope looks and feels like a piece of quality gear. A lot more functionality than I'm used to and more than I'm sure I'll ever need.

The last 20 pages or so should really give you all the information you need for plugging a new key in.

Some very smart people on this board. I'm glad to have stumbled upon it and happy to have this as a resource now.

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