Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
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marmad:
Just found another brand new feature added to the latest firmware (which, honestly, should have been there from the start):

CURSORS in X-Y Mode:

marmad:
Yesterday, I reported that I had (finally) found a situation in which the Anti-Aliasing ACTUALLY WORKED - but I deleted that post once I discovered the DOTS mode bug (which, as mentioned below, is tied to it).

But I re-investigated the issue just now... and it's funny. I guess switching on Anti-Aliasing is just causing the DOTS mode to display the waveform as it SHOULD - given the memory size and sample rate - but it simulates a "correct" anti-aliasing technique.  ;D

Look at the following series of images made in DOTS mode:
1) MemDepth: 1.4M (no DOTS bug)/ Anti-Aliasing: OFF = obvious aliasing.
2) MemDepth: 1.4M (no DOTS bug)/ Anti-Aliasing: ON = absolutely no change to the aliasing.
3) MemDepth: 56M (DOTS bug)/ Anti-Aliasing: OFF = obvious aliasing.
4) MemDepth: 56M (DOTS bug)/ Anti-Aliasing: ON = aliasing is fixed!
5) MemDepth: AUTO (DOTS bug)/ Anti-Aliasing: OFF = obvious aliasing.
6) MemDepth: AUTO (DOTS bug)/ Anti-Aliasing: ON = aliasing is fixed!

NikWing:
yeah, not many have cursors in XY mode, I guess that's another reason for people to buy Rigol XD
I hope mine comes tomorrow or friday ...
it's on the way, oh yay


edit: marmad, might you explain the background on the anti-aliasing problem? it would help me understand the problem :o
marmad:

--- Quote from: NikWing on December 18, 2013, 08:37:34 pm ---edit: marmad, might you explain the background on the anti-aliasing problem? it would help me understand the problem :o

--- End quote ---

Search back through this thread, my friend. There is PLENTY of discussion about it  ;)
Fagear:
Now I'm in!
I went to local distributor in Moscow in bought the DS2072A device.

My device details:




I'm ready to do some tests and anything else except opening the device. So no JTAG dump (and I even had no JTAG programmer). :-\

I did some weird "parallel decoding" with internal calibration signal (attachment 4).

I have adjusted compensation on both probes (they are RP3300A, 10:1 only, 300MHz) and performed an self-calibration with nothing on BNCs.

Some measurement of noise with open BNCs and different settings: "Full (70 MHz) BW, 1 Meg", "20 MHz BW, 1 Meg", "Full (70 MHz) BW, 50 ohm", "20 MHz BW, 50 ohm". Results are in attachments.
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