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REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol

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David_AVD:
Those test point "hoops" on that demo board look neat.  Has anyone seen those for sale?

marmad:

--- Quote from: David_AVD on June 10, 2013, 12:32:12 am ---Those test point "hoops" on that demo board look neat.  Has anyone seen those for sale?

--- End quote ---
Well, in the original post I made (which you can see in the quoted area above), I mentioned I found the device (and images) at Batronix(.com) in Germany.

Here's the data sheet.

David_AVD:

--- Quote from: marmad on June 10, 2013, 12:55:08 am ---
--- Quote from: David_AVD on June 10, 2013, 12:32:12 am ---Those test point "hoops" on that demo board look neat.  Has anyone seen those for sale?

--- End quote ---
Well, in the original post I made (which you can see in the quoted area above), I mentioned I found the device (and images) at Batronix(.com) in Germany.

Here's the data sheet.

--- End quote ---

Thank you.   :)

Galaxyrise:

--- Quote from: marmad on June 09, 2013, 08:49:30 pm ---Seriously though, if you want to do any more playing around, I would strongly suggest that you don't use 14M or 56M sample lengths - since traditionally, one of the tools to battle against aliasing is to increase sample length (since that automatically increases sample rates and/or samples being decimated for the display). If anti-aliasing works at all on the Rigol, it should first and foremost be working when you have small sample lengths - so that switching it on might (in the background) automatically force the DSO to capture more samples for random decimation (or change sample speeds) in order to prevent the occurrence of the aliased waveform.

--- End quote ---
I didn't post pictures of the smaller memory depths because AA never did anything for them, not because I didn't try it.  But going back at it, I am able to get a very subtle change at 140k in some situations.  I experimented  with what happens to the sample dots themselves and could find no difference at any memory depth.

And that leads to the final nail in the coffin:  You can toggle AA while STOPped, and it does the same thing as toggling it while running.  So you're right, it's image improving, and not waveform improving. This is true for High Res, too!  Perhaps that explains why you never get 10-bit values out of the scope with RUU: it's entirely a display-time trick.

High Res troubles me in general.  For example, 1Vpp 66,666Hz sine wave at 10us/div, 200mV/div looks great in high res.  Now go to 1ms/div.  The signal shrinks to half amplitude!  Now turn on Anti-Aliasing for some real fun: it... aliases into a 8% amplitude, 5kHz wave.  Changing the vertical scale to 50mv and it halves the amplitude again!  Like I said, AA and High Res don't get along :) If I try to zoom all the way into the sample dots with high res active, I can't.  I always get a line.

AA does make some of my captures prettier, enhances certain glitches, and hasn't (yet) hidden any transients in my testing tonight.  The biggest drawback seems to be the wfm/s hit (which varies considerably based on the time base and memory depth.)

Electro Fan:
Sorry for being off topic on the current thread conversations, but since this seems to be Rigol 2000 Central is it correct that the I2C and SPI decoding option for the 2000 series (which also includes the RS232 decoder) is about $220 vs on the 4000 series you need to purchase the I2C and SPI decoding options separately for about $500 each ($1k total)?   Thanks

PS, decoder pricing aside, I've tried to stay up to speed with this 80 pager on the 2000 and other Rigol threads, but if anyone can post/paste links to anything that nets out the differences between the Rigol 2000 and 4000 series that would be great - Thx again

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