| Products > Test Equipment |
| REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol |
| << < (217/566) > >> |
| marmad:
--- Quote from: Hydrawerk on June 06, 2013, 08:08:20 pm ---Is there any reason to switch off the Anti-Alias function? --- End quote --- https://www.eevblog.com/forum/blog/eevblog-474-gw-instek-gds-2000a-series-oscilloscope-unboxing-fi/msg242748/#msg242748 |
| marmad:
--- Quote from: XaS on June 06, 2013, 08:08:15 pm --- --- Quote from: marmad on June 06, 2013, 07:38:12 pm ---Honestly, I wonder if the AA actually works (or works well) on the DS2000. Can anyone post 'before' and 'after' screen shots of the AA making a noticeable difference? --- End quote --- Actually, I saw the effect of AA yesterday by accident. I had an 1kHz sine wave on both channels, both with some serious noise on them (it was an audio signal from a laptop). Edge trigger had some problems on catching the sine waves steadily and the curves jittered left and right. Due to false manipulation I switched on AA accidentially and I got the sine waves as if they were amplitude modulated with about 0.5Hz. They slowly went from a flat signal to the full sine waves and the back again to zero. Since I wasn't interested in this, I have no evidence on it happening. And right now I can't reach the DSO... XaS --- End quote --- Thanks, Xas. Any idea what time base you were on so I can try to replicate? |
| Hydrawerk:
--- Quote from: marmad on June 06, 2013, 08:14:17 pm --- --- Quote from: Hydrawerk on June 06, 2013, 08:08:20 pm ---Is there any reason to switch off the Anti-Alias function? --- End quote --- https://www.eevblog.com/forum/blog/eevblog-474-gw-instek-gds-2000a-series-oscilloscope-unboxing-fi/msg242748/#msg242748 --- End quote --- Oh, That's weird. At DSOX2002A there is no such feature, or it's probably still ON. :palm: Dave could not produce any aliasing with this scope. Well, the scope is Apple-like, we know. :palm: |
| XaS:
Ok, I ran over to my friends house and have the DS2072 back here now. First, with 1kHz sine and 500us time base, there is an effect. Without AA, the sine wave jitters arround like hell. With AA on, the display rate is MUCH slower (I'd say about 4fps compared to >20fps before) and the sine wave is more or less shown stable. So far I fail to reproduce the effets I saw yesterday. I'll keep on trying for a minute or two... XaS |
| marmad:
@EV: I think you were the one that originally posted about the Anti-Alias bug. Can you please confirm that Anti-Aliasing is working in the current FW with a 'before' and 'after' screen shot? --- Quote from: XaS on June 06, 2013, 08:46:30 pm ---First, with 1kHz sine and 500us time base, there is an effect. Without AA, the sine wave jitters arround like hell. With AA on, the display rate is MUCH slower (I'd say about 4fps compared to >20fps before) and the sine wave is more or less shown stable. --- End quote --- Hmm.. but at the 500us/div time base, the sample rate is 2MSa/s - plenty fast enough to reproduce a 1kHz wave without any aliasing. On my DSO, it is rock solid (no aliasing) with those settings. |
| Navigation |
| Message Index |
| Next page |
| Previous page |