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

--- Quote from: EV on December 30, 2013, 08:36:33 pm ---Are you going to do a separate list of these bugs? So we could check if they are in the next FW uodate.

--- End quote ---

I don't think I would bother unless someone with a HW v.2 model (or A model) confirms each bug on their DSO. Some of the bugs might be hardware (v.1) related - and so would never get fixed by Rigol. Besides, EV, honestly, I'm not sure 300MHz is a good choice on hardware that wasn't designed for it.

I tested 300MHz option for about 3 weeks - and I had a few crashes - even one where the DSO started incorrectly believing it was a 2072 until I rebooted. Then today, after my trigger got screwed up and couldn't be corrected, I uninstalled it. Now at least if the DSO crashes, I will know that it's not because of the 300MHz option.

But if someone else wants to compile a list, I'm happy to tack it on at the beginning of the thread.
PA0PBZ:

--- Quote from: marmad on December 30, 2013, 08:52:51 pm ---I don't think I would bother unless someone with a HW v.2 model (or A model) confirms each bug on their DSO.

--- End quote ---

I have a non-A version 2 hardware, can you point out one or more bugs that are easy reproduced? I can do some tests tomorrow.
marmad:

--- Quote from: PA0PBZ on December 30, 2013, 08:55:41 pm ---I have a non-A version 2 hardware, can you point out one or more bugs that are easy reproduced? I can do some tests tomorrow.

--- End quote ---
Well, I don't know what caused my various crashes and strange behavior (which is one reason I wanted to uninstall that option) - but here are two other bugs reported that could be reproduced:

https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg356180/#msg356180

https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg353620/#msg353620
EV:
I uninstalled BW 300M option. I can still get 1 ns time base from saved setup file with 1 ns time base. It goes away if I rotate horisontal scale button.

There is not much use with this option with so few sample points. There is about 2 dB difference at 300 MHz between DS2202 (-5 dB) and DS2302 (-3 dB). Both give trace from 300 MHz signal.
mgrim:

--- Quote from: marmad on December 28, 2013, 01:26:36 am ---But it seems to me you have a very simplified idea about how the captured samples end up as interpolated display. If vectors are ON, the display memory ALWAYS contains 1400 bytes (700 vectors) - it doesn't matter if the ADC captures 14M - or - 28 samples during the acquisition window. There are a WHOLE bunch of steps involved in arriving at those 1400 bytes - just one of which is the actual sin(x)/x or linear interpolation algorithm.

--- End quote ---

Hmm, that sounds interesting.

Could you please explain what the data in display memory actually is?

I've always wondered why there are 1400 bytes while the display is only 700 points wide, but wasn't able to come up with any verifiable scheme.
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