Products > Test Equipment

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

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marmad:
Following up on some info discovered about the DS2000 in another thread, I thought I'd post the info here in an effort to inform owners who hadn't seen it there.

The DS2000 series appears to have trigger jitter/offset in the Zoomed trace while at lower sample rates (in Delayed Sweep mode). It appears to follow this pattern:

When in Delayed Sweep mode:

Sample rate >= 1GSa/s: no conspicuous jitter or offset
Sample rate <= 500Ms/s: jitter and/or offset equal to a maximum of plus or minus one sample period

So for example, @ 200MSa/s it's equal to ±5n, while @ 10MSa/s it's equal to ±100ns.

I'm not sure yet if this is a firmware issue or not (these tests are from the latest FW version). If someone has a chance to test a lower FW version, please post the results here.


Here is an example of jitter @ 100MSa/s  (i.e. ±10ns) in Delayed Sweep:




Rigol's response to this 'issue' is here.

sync:
FYI the DS1000Z has that jitter too.

Wim13:

Has all to do with phase differences..

If you synchro the clock rate off the DSO with signal generator it stands still.

Carrington:
LOL... The DS2000 and the average of everything that shakes.

Normal:


Average:


This also has to do with phase, in this case phase trigger/signal. Playing with holdoff, can be corrected.
I think that David L. Jones has a video about something similar.

marmad:

--- Quote from: sync on November 29, 2013, 02:54:52 pm ---FYI the DS1000Z has that jitter too.

--- End quote ---

Thanks for the info, sync.


--- Quote from: Wim13 on November 29, 2013, 03:03:25 pm ---
Has all to do with phase differences..

If you synchro the clock rate off the DSO with signal generator it stands still.

--- End quote ---

Hey Wim - good to see a post from you  :)

Phase difference between what, exactly? Between the sample rate and the delayed sweep rate?

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