Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
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XaS:
Ok, got it now. I don't know if this is a real difference or just a problem of the UI.

The key was to turn on averaging, too. On 1kHz, 100us time base, average = 2, there is a remarkable difference in the amplitude of the signal, depending if the AA is on or off. (The values with AA off seem to be correct.)

By the way, I noticed that since v01.00.00.03, the Quick Print files are called DS2... instead of DSX... and there is a header with the model number, serial, date and time on top. So far, I couldn't figure out a way to switch it off. Is this new with v01.00.00.03?

XaS
marmad:
Honestly, in the 7 months I've had the DSO, I never tried using the Anti-Aliasing (I was taught too well to look out for aliasing - so I never really worry about being 'fooled'). Now that I'm trying to test it, it doesn't really seem to work (unless I'm missing something obvious). And I've just tried downgrading to v.01.00.05 and it still doesn't appear to work correctly.

I just give the DSO a 100kHz sine wave and switch to 50ms/div. Serious aliasing going on with what appears to be a 10Hz sine wave displayed. But Anti-Aliasing ON/OFF changes nothing.

Edit: Here's a 10MHz sine wave at 10ms/div - looking like a 100Hz sine wave because of aliasing - Anti-Aliasing has no effect ON or OFF.
ve7xen:
I had a similar experience yesterday with a 10MHz sine on slow(ish) timebases. AA on/off seemed to make no difference.
XaS:
Ok, same here. Lacking a decent waveform generator, I'm limited to 20kHz. But on the 500ms time base the DSO shows a 0.5Hz sine wave. No change with or without AA. The wron waveform is shown down to the 20ms time base, with 10ms or lower the 20kHz are shown correctly.

XaS

Edit: Of course, selecting more than 7kPoints solves the problem for 20ms and some more above.
marmad:
Ok, thanks for the verifications. Into the bug list it goes - and I'll pass it along to Drieg.


Edit:


--- Quote from: XaS on June 06, 2013, 09:26:54 pm ---Edit: Of course, selecting more than 7kPoints solves the problem for 20ms and some more above.

--- End quote ---

Yes, that would be the standard way to solve the problem - increase the sample length in order to increase the sampling rate. But still, we have the special feature - it should work!  ;)


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