Products > Test Equipment
Siglent SDG1032 as bad as rigol DG812?
joeqsmith:
--- Quote from: nctnico on May 20, 2024, 09:14:03 am ---Thanks for elaborating further on your testing. The conclusion has to be that there have to be differences between units then. Maybe Siglent decided to remove some capacitors or a capacitor with a different behaviour has been placed (*). 2 forum members have showed an effect your unit doesn't have.
* Do not assume that ordering the same part number gets you an identical capacitor every time! This sounds silly but I have experienced this myself.
--- End quote ---
It wouldn't surprise me.
--- Quote from: eTobey on May 16, 2024, 07:11:21 am ---Found some issues that dissapointed me quite a bit. Never thought i would be that dissapointed, since the step from the Rigol DHO814 to the Siglent SDS814X HD was a good one.
...
- Turning the knob faster, has the opposite effect of slowing down the change in the number, to almost non at all.
- Turning it in the right speed takes still 13 seconds to get from 0 to 100.
...
--- End quote ---
The one I looked at would also decrement when it should increment and vice versa. This unit was purchased a couple of years ago. If yours is brand new, it could be different hardware. If you like, I can attempt to replicate what you are seeing. I could then provide a build date or something. If there was a hardware change that caused the unstable output, maybe we could narrow it down. Then again, Siglent should be able to answer this.
rf-loop:
--- Quote from: eTobey on May 20, 2024, 09:35:03 am ---
--- Quote from: nctnico on May 20, 2024, 09:14:03 am ---Thanks for elaborating further on your testing. The conclusion has to be that there have to be differences between units then. Maybe Siglent decided to remove some capacitors or a capacitor with a different behaviour has been placed (*). 2 forum members have showed an effect your unit doesn't have.
* Do not assume that ordering the same part number gets you an identical capacitor every time! This sounds silly but I have experienced this myself.
--- End quote ---
I just noticed, that the "fun" happens in around 10ms, where as rf-loop has some action going on for 400ms!
It seems that his device has some much bigger caps somewhere. Or some relais are different.
--- End quote ---
Lets do some fact check. Add some clarification to this fairy tale. For example, let's start with you telling where and what.
When you refer to me, please state what I have said or shown. Don't make up your own fairy tales or interpretations of them!
rf-loop:
--- Quote from: nctnico on May 20, 2024, 12:29:34 pm ---
* Do not assume that ordering the same part number gets you an identical capacitor every time! This sounds silly but I have experienced this myself.
--- End quote ---
This is completely self-evident everyday life for anyone who has worked, for example, in the manufacturing industry and also designed various devices there. In very many cases, the so-called worst case combinations must be taken, more or less, into account and planned in such a way that even in those situations the devices work within the specifications.
Of course, this problem is also limited, for example, by inspecting the components before they are used, especially if something a little more critical (and valuable) is being done. On the other hand, it is also normal that during production testing some of the finished products just go to scrap or recycling or, if it is an expensive device, to a repair / rework round.
joeqsmith:
--- Quote from: rf-loop on May 20, 2024, 01:52:27 pm ---...In very many cases, the so-called worst case combinations must be taken, more or less, into account and planned in such a way that even in those situations the devices work within the specifications. ...
--- End quote ---
Reminds me of when Robert Pease took on Taguchi.
https://www.electronicdesign.com/archive/article/21754886/whats-all-this-taguchi-stuff-anyhow
eTobey:
--- Quote from: rf-loop on May 20, 2024, 01:34:28 pm ---Lets do some fact check...
--- End quote ---
Fact is, you havent delivered a comparable test...
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