Products > Test Equipment
Rigol Rubbish DG800 - An expensive piece of Junk
m k:
--- Quote from: eTobey on May 10, 2024, 05:40:37 pm ---I got the Rigol DG812, and i am really dissapointed... say furious.
--- End quote ---
I'd say that your expectations were out of the region.
Commercial rule of thumb is that lost customer is too expensive to get back.
Would it be better to sell it with some loss than keep it and feel the endless pain.
I'd say former.
Amount of money is not significant, its value is.
thm_w:
--- Quote from: Njk on May 14, 2024, 09:32:32 am ---
--- Quote from: Aldo22 on May 14, 2024, 08:58:47 am ---I don't actually see any advantages with the 33120A that would be convincing for me.
In my opinion, the device is simply outdated, if only because of its size (374mm depth, 4kg) and I'm not particularly interested in whether it can still be repaired in 20 years' time.
I don't own a museum ;)
--- End quote ---
Sure. But keep in mind that typical modern generator has its waveform output connector internally grounded. That's not the case with the obsolete instrument.
--- End quote ---
Oh good feature. 33120A is spec to float 42V from earth.
DG800 Pro has both output grounds tied, but, isolated from earth via the USB power supply. Though I'm not sure how far you can really safely float them, as its not an advertised feature... But I would hope 42V is fine. Same with the DHO800, you are supposed to tie the chassis to earth, how many people actually do though..
Martin72:
So many people will do this who don't know why the scope should actually be grounded.
At some point they will realize that it might have been a good idea after all.
2N3055:
--- Quote from: thm_w on May 14, 2024, 10:54:52 pm ---
--- Quote from: Njk on May 14, 2024, 09:32:32 am ---
--- Quote from: Aldo22 on May 14, 2024, 08:58:47 am ---I don't actually see any advantages with the 33120A that would be convincing for me.
In my opinion, the device is simply outdated, if only because of its size (374mm depth, 4kg) and I'm not particularly interested in whether it can still be repaired in 20 years' time.
I don't own a museum ;)
--- End quote ---
Sure. But keep in mind that typical modern generator has its waveform output connector internally grounded. That's not the case with the obsolete instrument.
--- End quote ---
Oh good feature. 33120A is spec to float 42V from earth.
DG800 Pro has both output grounds tied, but, isolated from earth via the USB power supply. Though I'm not sure how far you can really safely float them, as its not an advertised feature... But I would hope 42V is fine. Same with the DHO800, you are supposed to tie the chassis to earth, how many people actually do though..
--- End quote ---
33120A isolated ground is just that. It serves the purpose to prevent DC/low frequency current ground loops while measuring.
It is not to be used as a fully floating signal source.
Other thing is that signal output to protective ground leakage and capacity is not specified in D.S. so for AC you might have much less isolation than you think...
tautech:
For some reason it seems industry std is + 42V but not clear to me.
The discontinued SDG5000 range offered this as does the current USB AWG module SAG1021I.
P5
https://int.siglent.com/upload_file/user/SDG5000/SDG5000_DataSheet_DS02050-E03C.pdf
https://siglentna.com/product/external-arbitrary-waveform-generator-2/
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