Or the 20Mhz bw limit is done in the digital domain with a 8 bit signal path? You said it was turned on if I remember correctly.
But I'm also still happy with my Rigol :-)
Is there a way to adjust the trigger to 50% of the signal? I don't see this button which was quite handy on my previous rigol...
Is there a way to adjust the trigger to 50% of the signal? I don't see this button which was quite handy on my previous rigol...Presuming you still want the signal displayed with DC coupling, you can put the trigger in AC coupling and 0V and it will do that.
Maybe EV or Wim can do a Sweep with DS2000 set @ 500uV, I only did from 4-40 MHz
(...) Could you please send a 100kHz sine wave into your Agilent DSO - then adjust the horizontal scale until the sampling rate shows 100kSa/s - then grab a screen shot and post it (...)
Thanks,
Mark
Here are my pictures. I added a 10MHz at 10MSa/s. There is some small product of aliasing, but it's OK. It is not a clear sine wave, that fools you.
I think pix are close to Hydrawerk's conditions
Huh? Totally aliasing - not close at all.
So how do similar pictures from DS2000 look like?I think pix are close to Hydrawerk's conditions
So how do similar pictures from DS2000 look like?I think pix are close to Hydrawerk's conditionsThank you for the pictures. What happens if you turn on the Antialiasing feature?
marmad and now Teneyes expect this feature to do something else in undersampling mode. But looks like they will get either noise with some aliasing (Agilent) or "classic" aliasing (Rigol). they don't get to see the real signal while undersampling. So guys pick your poison
hydrawerk, here is the antialiasing feature at work on Rigol https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg255344/#msg255344. It attempts to minimize moire patterns on the display. I think it works fine
marmad and now Teneyes expect this feature to do something else in undersampling mode. But looks like they will get either noise with some aliasing (Agilent) or "classic" aliasing (Rigol). they don't get to see the real signal while undersampling. So guys pick your poison
I realize that normally the DSO triggers on a select trigger (condition) and that there is a need to record data before and after the event. I am finding it an annoyance to have to wait as the DSO records long data before I am able to force a trigger.
When I select , "Single" I want 1 event
When I select , a Long time base , 1 min/div ( anything greater than 2 seconds)
When I move trigger point to near left edge of the Display ( showing I wish to see data after the trigger)
and then I press a "Force" trigger, I wish to see data Now
I think the DSO should start the trace immediately and just show the data immediately at the trigger point and NOT make me wait a long time for the DOS to record a preample.
Nope not for me :
At 20s/div, 14 Mpts, 50KSa/s ,
After moving trigger point to 5 div left of center (on the screen), "Wait" takes 40 seconds to Arm
After moving trigger point to 5 div left of center (on the screen), "Wait" takes 40 seconds to Arm
Yes , got it now, to get immediate tracing on manual trigger set the trigger exacting at left edge of the display, Just an OLD dude like the scan, I'm a bit slow ,
before left edge, then you wait to see trace
after left edge then you wait to arm
yeah sure , STOP DEAD
3:18 AM , time for bed
This is basically what a 100kHz sine wave SHOULD look like at 500ms/div:
This is what the Rigol displays @500ms/div using 200kSa/s:
This is what the Agilent displays @500ms/div using 100kSa/s:
Which is closer to the REAL signal?
"Anti-aliasing" should eliminate aliasing - period. If that means that the DSO needs to 'lock' the sample size while the feature is being used - that's what it should do.
Agilent is more real, but it's lying about the sampling rate. It's oversampling the signal and then performs DSP on it to down convert to 100ksps.
Rigol shows the real 200khz sampling rate. with only two samples per cycle it's not able to represent the amplitude correctly so it appears like the signal is amplitude modulated. Rigol shows what you asked, with no gimmicky "stochastic" sampling.