Rigol DHO814 Ultraacquire not ultra... - Page 1
Forum section: electronics / testgear

author: eTobey
author_rank: Super Contributor
timestamp: March 13, 2024, 07:50:12 pm
content: I find this feature quite nice, until just now i tried it out for the first time.I wanted to capture some rather slow reset signals, so i tried it first with creating signals by tapping the probe on 3V by hand.My understanding is, that it will take x captures or x seconds before it displays the curves. (Unfortunately the timeout only goes to 1s!)While trying it by hand, i found, that it will just randomly copy curves sometimes even 5 times (!).There cant be hardware or software limitations, that it can only go to 1s can there? It does not matter how many samplepoints i set.I somehow got the feeling, that not much time has been put into testing this product, before it hit the market...

author: csuhi17
author_rank: Frequent Contributor
timestamp: March 13, 2024, 09:33:24 pm
content: This function is so buggy for me, that's why I gave it up.the software freezes several times.

author: ebastler
author_rank: Super Contributor
timestamp: March 13, 2024, 09:36:32 pm
content: I'm afraid "UltraAquire" is just a marketing ploy, designed to enable Rigol to put high waveforms/second figures and a "unique feature" into the datasheet. It is not meant to be actually used.

author: thm_w
author_rank: Super Contributor
timestamp: March 13, 2024, 09:47:05 pm
content: Bugs thread is here:https://www.eevblog.com/forum/testgear/rigol-dho800900-oscilloscope-bug-reports-firmware/

author: Martin72
author_rank: Super Contributor
timestamp: March 13, 2024, 10:00:50 pm
content: QuoteI had tried it umpteen times, in different variations and came to no conclusion, except that, as ebastler already wrote, it must be a gag.

author: eTobey
author_rank: Super Contributor
timestamp: March 13, 2024, 11:18:14 pm
content: I tried the record feature now. That works quite a bit better, but either its not intuitive, are as buggy as the Ultrastuff.Mostly i dont see curves with the record feature, i may read the manual there...I was so delighted to have gotten this scope, just like a child at christmas. But now i begin to feel like i got some socks and other clothing as a gift!

author: egonotto
author_rank: Super Contributor
timestamp: March 13, 2024, 11:25:28 pm
content: Hello,I have a DHO1074 and there this function is not very useful. I tried to capture a signal every 5 ms and there are gaps. And to make matters worse, you can't save it.Best regardsegonotto

author: 2N3055
author_rank: Super Contributor
timestamp: March 14, 2024, 07:39:08 am
content: UltraAcq IS useless gimmick.Except quite decent performance of ADC and front, the rest of the scope is not much better than a gimmick either...

author: eTobey
author_rank: Super Contributor
timestamp: March 14, 2024, 03:50:29 pm
content: Quote from: 2N3055 on March 14, 2024, 07:39:08 amI can affirm that. I tried to use the record feature, which in theory is actually epic. But its as useless as the ultra-useless feature, because waveforms are not visible, or do not scale when scaling. The UI for this is embarrasing. You have buttons that you can use, but these are disabled.I did not read the manual for the record, but i dont think i will find something that would really help judging from the experience of others here...

author: Caliaxy
author_rank: Frequent Contributor
timestamp: March 14, 2024, 04:57:29 pm
content: Quote from: eTobey on March 14, 2024, 03:50:29 pm^^^ Assessment coming from an EEV blog member whoowns the device but doesn't read the manual,confirmed by another EEV blog member whoreads the manual but doesn't own the deviceFair enough

author: Randy222
author_rank: Frequent Contributor
timestamp: March 14, 2024, 05:42:43 pm
content: Rigol 1-up'd the other brand, so a longer feature list.Being useless is not a metric they measure.

author: 2N3055
author_rank: Super Contributor
timestamp: March 14, 2024, 07:58:45 pm
content: Quote from: Caliaxy on March 14, 2024, 04:57:29 pmCommented by member who does not exactly understand what is being commented..We are quite a bunch, aren't we..FastAcq is useless gimmick. Nobody ever demonstrated what it is used for, and in that mode nothing can be used: no measurements, no decode, nothing.. It only puts some wiggles on screen. In several "special" display modes that are pretty much not useful at all.It is just a gimmick to claim high Wfms/s and to have "another feature".

author: Martin72
author_rank: Super Contributor
timestamp: March 14, 2024, 08:48:30 pm
content: High update rates are said to be useful for detecting rare signal anomalies, among other things.I had tried this with different random pulses in the signal over time.I always detected them reliably with the corresponding trigger mode in the normal acquisition mode of the scope.But never in this UA mode, on the contrary, all you could see was a bunch of lines

author: eTobey
author_rank: Super Contributor
timestamp: March 14, 2024, 10:07:32 pm
content: Quote from: Martin72 on March 14, 2024, 08:48:30 pmWhen using UA with 200ms signals, it often just copies them multiple times. Who can tell me, that it does not do this with faster/more frequent signals, and discarding those, that i am looking for actually?BTW: I found out, that the actually use alot of Opensource software. I got the feeling, that they just had some students puzzling these together.