| Products > Test Equipment |
| Scope with fast waveform averaging (can your scope go faster?) |
| << < (4/8) > >> |
| JehTeh:
I tried again with a 1Hz sine wave - it does get a bit worse, you can see the 16K averages and 32K averages attached. 16K is a bit over half, 32k is roughly 1/4 FS. The only other difference to the last test is I just moved the GPSDO 10M reference to the EXT trigger in, so we have a 10M instead of 1M external trigger for this, but I don't think that will matter. On auto memory depth at 200ps/div it sets 20pts - if I manually select the lowest option for memory depth in the averaging window (1k) it does not appear to change the measurement by much if at all (maybe the tiniest bit smaller with more data). The last two attachments are at 32k samples 100ns/div. Auto memory sets 10kpts, signal is basically gone, manually setting 1k points we are right around 1/4 FS still, just the smallest bit less than at 200ps/div. |
| Performa01:
--- Quote from: maxwell3e10 on August 05, 2022, 01:47:18 pm ---On Siglent SDS1104X-E I get very slow averages even if the number is set to 4. Not sure if it has the latest firmware or maybe some other setting is making it slow, perhaps someone else should check. --- End quote --- I had the opportunity to have a look today and unfortunately you're right. The implementation of the Average mode seems to be very different on the SDS1000X-E series. We get only a handfull of averages per second, yet the acquisition rate remains high at up to 50k triggers per second. This can serve as a warning that the trigger rate does not necessarily need to be correlated with averaging speed. Averaging looks like a true acquisition mode on the SDS1000X-E, but quite obviously is some post processing. On the SDS1000X-E, we can use Dots display mode to speed up the trigger rate, but the averaging performance will not change because of this, i.e. it is still very slow. By contrast, a SDS2000X HD or SDS6000 does not even allow Dots Display mode to be used together with Averaging Acquisition mode. Trigger rate is slower (yet well beyond 10k) but averaging performance is vastly better. BTW, what's the "Rigol DS6104" in your 2nd posting? |
| maxwell3e10:
Thanks for checking SDS1104X-E. It's interesting that trigger rate is not always indicative of average update rate. Rigol DS6104 is a (now discontinued) 1 GHz scope that I have, it's around 2010 vintage. I am hoping there is something faster now. |
| DaneLaw:
--- Quote from: maxwell3e10 on August 04, 2022, 08:15:11 pm ---i I am still collecting data for how fast various scope... So far my results are: Typical low-cost scopes (Siglent, Micsig, Owon): 8 to 16 averages --- End quote --- That is as relative as it comes.. if you have tested something specific on a given osccilioscope' then refer to that model, and not the whole brand as per se.. Do recall these vendors have tons of models ranging from a few hundred bucks to numerous thousands, even Micisig varies from entry "M-model" to "ETO model" and there are numerous models in between and they seem to vary quite a bit from model to model. Same with Siglent and likely also Owon. - if you have tested a given model, and have some tangible test-data, then at least refer to it. and clock it to a given model.. |
| maxwell3e10:
I was referring to typical low cost, but popular models (Siglent 1104X-E, Micsig TO1104, Owon XDS3104), under $1k. I don't have a Rigol in this class to test. Here the standout is Keysight EDUX, which uses the hardware of higher-end models. Btw, there is no data so for on any Tektronix scopes, is there any hope for them? |
| Navigation |
| Message Index |
| Next page |
| Previous page |