Products > Test Equipment
Sniffing the Rigol's internal I2C bus
granz:
--- Quote from: NikWing on January 15, 2014, 08:17:14 pm ---
I don't find any supported interface in germany
the next I see is the olimex from the UK via ebay ...
or shops want 25+ EUR extra ...
I'll never need a jtag again in the future D:
--- End quote ---
6,99 euro:
http://www.ebay.de/itm/USB-Blaster-Programmer-W-Cable-for-ALTERA-FPGA-CPLD-JTAG-Development-Board-AS-PS-/251282935520?pt=Wissenschaftliche_Ger%C3%A4te&hash=item3a81a14ee0
Added benefit of allowing you to get started with Altera FPGAs.
Rigby:
--- Quote from: cybernet on January 15, 2014, 08:01:09 pm ---except if there would magically appear a tool to dump stuff without need for jtag ... *cough*
--- End quote ---
Excellent. :-+
NikWing:
yeah, seen the chinese thing XD look at shipping date :)
oh well, let's wait some more ... :)
granz:
--- Quote from: marmad on January 14, 2014, 11:44:54 pm ---
On top of this, I've overlaid the results (the yellow line) that someone posted here for the response curve of a 300MHZ "enabled" DS2000 HW v.2. If these results are correct, the area of filter leakage (the orange diagonal lines) increases to a point above -6dB when using two channels.
I would suggest, for anyone enabling 300MHz on ANY DS2000 - that wants to be certain of signal fidelity (unless/until we see further tests), to use it only with 1 channel @ 2GSa/s (otherwise use the channel BW filter).
--- End quote ---
Marmad, thanks for posting this. This is what I was concerned about with all the unlocking going on, but I never saw the source of the yellow trace. Once I find (or borrow) a higher frequency signal generator I'll try to collect some more data from my (now unlocked) DS2072A and post.
marmad:
--- Quote from: granz on January 15, 2014, 09:03:18 pm ---Marmad, thanks for posting this. This is what I was concerned about with all the unlocking going on, but I never saw the source of the yellow trace. Once I find (or borrow) a higher frequency signal generator I'll try to collect some more data from my (now unlocked) DS2072A and post.
--- End quote ---
No problem. I think it's important to find out how low >= 500MHz signals are when the 300MHz option is enabled. Rigol doesn't have the greatest skills at designing filters - and I have to think market pressures (GW-Instek and Siglent releasing 300MHz low-cost DPO models) and the desire to have "new" features for the A-model were the driving reasons behind the new BW - rather than their touted "New input stage" :)
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