Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
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g2:

--- Quote from: Harvs on June 09, 2013, 09:13:18 am ---
--- Quote from: g2 on June 09, 2013, 09:02:50 am ---I returned the Rigol DS2072, maybe I should buy it again.

--- End quote ---
:palm: I hope it didn't cost you anything to return it!

--- End quote ---

It cost me the postage. It was within the rights of return
But it's ok, except if it had been a defect on Rigol oscillosscope.
g2:

--- Quote from: marmad on June 09, 2013, 10:47:18 am ---
--- Quote from: g2 on June 09, 2013, 10:35:10 am ---Grounding was in the past for extra protection.
Now, it is obviously necessary.
As I have said before, in Denmark we were first grounding in new houses about 1995 (in wet room before). I would have been happy for a digital oscilloscope, who absolutely not have to be grounded.

--- End quote ---

Regardless of wiring in Danish houses, any electronics operated from switching power supplies need to be grounded - and always have. I noticed back in 1988 when I ran my PC without a ground connection that there was 110-120V potential on the metal case.

--- End quote ---

You are right.
I did not realize it with switching power supplies.
And coincidentally, I have had my PC grounded, but it was for another reason (I thought). At the time I pulled the ground cord from the wet room to my hobby room.
Now I can use the ground wire to a new oscilloscope  :D
marmad:

--- Quote from: Teneyes on June 09, 2013, 11:02:46 am ---I thought the display is cleared after each trace in normal mode ?  ???
--- End quote ---

No, a DPO scope with intensity grading has what you could call a 'Z-buffer' (for lack of a common term) which combines all acquired waveforms. If you have multiple triggers happening within a given time frame (you were set to AUTO MemDepth @ 100ns - which means up to 16,790 triggers per second), they will appear simultaneously on the display with the minimum 'decay' time (or longer - if you have persistence set higher) - and WAITing for a trigger freezes the decay. This is actually advantageous - and helps spot multiple triggers and glitches.

BTW, here's an interesting document on different techniques used for intensity grading (courtesy of tinhead).  :)
Teneyes:

--- Quote from: marmad on June 09, 2013, 11:27:13 am --- they will appear simultaneously on the display with a minimum decay time (or longer - if you have persistence set higher) - and WAITING for a trigger freezes the 'decay'. You were set to AUTO MemDepth @ 100ns - which means up to 16,790 waveforms per second.  This is actually advantageous - and helps spot multiple triggers and glitches.

--- End quote ---
aaaaah Yes,  Thanks Marmad,
bambam:
Hi all newbie here to the forum.

I hope its ok posting this here so late in the thread but, i just wanted to share my appreciation towards marmad for his help with upgrading my ds2072 firmware. he is super guy and its thanks to his brilliant video review and this thread i purchased the scope.

The ds2072 is my first ever scope and so far found it so easy to use and its made electronics hobby so much more enjoyable.
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