Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
EV:
--- Quote from: Teneyes on April 30, 2013, 06:49:01 pm ---Who was that on EEVBLOG that has a DS4000? (Please forward)
I wonder if this variations on the Trigger output also happens on the DS4000 series?
--- End quote ---
The Chump seems to have it and maybe AndyC_772.
Look at this thread:
https://www.eevblog.com/forum/projects/software-tips-and-tricks-for-rigol-ds200040006000-ultravision-dsos/255/
nack:
--- Quote from: Hydrawerk on April 30, 2013, 07:37:18 pm ---
--- Quote ---Who was that on EEVBLOG that has a DS4000?
--- End quote ---
Not sure, if he visits Eevblog, but it should be this man called Connor Wolf:
--- End quote ---
https://www.eevblog.com/forum/index.php?action=profile;u=58374
Jup. And he has quite an interesting youtube channel as well: https://www.youtube.com/user/Fake0Name
marmad:
--- Quote from: Teneyes on April 30, 2013, 06:49:01 pm ---I wonder if firmware would be able to set a fix delay, say 230ns for CHs and 175ns for EXT-IN. or is it just a race
(nops , in firmware to pad timing)
--- End quote ---
I don't get your point. If you are triggering an external device, the trigger just has to get there before the data changes. As I mentioned already, the total delay sets a maximum frequency (<4.5MHz, depending on when data changes) which the DUT could be running at. The 8ns jitter is meaningless - unless you are silly enough to try to use a frequency which falls in the jitter zone i.e. between ~4.5 - 4.7MHz).
Also, none of this excludes triggering the DSO after another device - or splitting the triggering signal to go the DSO and another device simultaneously. I really think the jitter is a non-issue - although I would prefer a shorter overall delay time.
--- Quote ---So, in order to build a MSO based on this DS2000, it sure is going to be Problematic for sync-ing.
--- End quote ---
An MSO would be all internal - it wouldn't use an external trigger out.
Jason:
The trig-out jitter won't matter for a LA. It needs a trigger for roughly when to capture, but for the actual analysis it'll use the bus clock for the exact timing.
It WOULD matter if I wanted to chain two DSO2000's together to watch four channels. The slaved scope is going to get 8ns of horizontal smear. For my use it's a non-issue but people trying to observe very fast edges will care.
A couple more observations playing with mine tonight: the jitter pattern is different between the ext trigger and the inputs; and when triggering on CH1 or CH2 the pattern changes when I adjust the vertical gain. Crazy.
Marmad: Yes, you're right, I read it wrong. The jitter has .25ns / 4GHz intervals, not .20ns / 5GHz.
EV:
Here are 3 pictures more about this trig out jitter. Trigger mode is auto from CH1. Note the different trigger level on the pictures.
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