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Rigol HDO1000 and HDO4000 12bit oscilloscopes launched in China

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mawyatt:

--- Quote from: Fungus on January 30, 2023, 07:09:32 pm ---Weird that none of the "experts" mentioned mirroring before I did.

Just sayin'...

--- End quote ---

Think GF mentioned "mirroring" in #687, and we mentioned aliasing earlier.

Best,

dreamcat4:
what i am finding the most amusing about all this is we were simply just trying understand adc linearity / imd. and then trying to use this specific scope feature measurement around fft we hit up these bug(s).

so then you inevitably end up wondering if we had picked any other tests on other scope features at random we wouldn't have seen the same levels of bugginess / things yet to be fixed.

therefore am struggling to feel sufficient levels of trust to spend those 1k usd (for me a lot, for others not). not until a much later timeframe on this model. maybe to come back and see after +6 months, then another +12 months from now. right? so end of 2023.

in meantimes i keep a lookout for any possible rtb2004 deals. which of course are few and far between or simply dont exist. nearest i got to see was a full locked no options for 1300. but didn't seem worth it compared to other pricing, or to the have to pay for the missing options on top.

but my other hope is that siglent might decide to replace some of their current lineup with newer model. in response to these new rigol. whichever - am not too deep into choosing and 1 camp to ignore the others.

but what i liked was rudi's deep dive video series for comparing the r&s against the siglent. at least that gives me a frame of reference. he put a lot of time and effort into those video series + document.

just am not seeing the point to bash these rigol hdo series over it. not until their team have fully a generous extra time to fix and improve on what is by all accounts a yet to be finished product. but if they want my money... they're gonna have to work for a bit longer at it. at least they seem on the right track. it just depends how well they respond and will be addressing these issues.

tv84:

--- Quote from: 2N3055 on January 30, 2023, 06:56:12 pm --- It wasn't tested properly, it was rushed to market... I refuse to believe Rigol engineers don't know this. They were not given enough time.

--- End quote ---

I expect a rushed DSO to have GUI problems. I have difficulty accepting that an erroneous FFT implementation,  that is there since day 1, is due to the fact that it was rushed to market. Proper FFT limits should be in place since the beginning.

These guys were programming a DSO, not a drawing tablet. If the physics of signal processing isn't correct why bother with the menus layout? Or they started with the menus because the libraries existed already?

Fungus:
Anyway ... I think it's clear what the problem is.

Also the workarounds: Always use a high sample rate, don't break Nyquist!

And what Rigol can do about it: Either fix their upsampling or, even better/simpler, truncate the FFT display.


Maybe @Dave could do a video calling them out.  :popcorn:

tautech:

--- Quote from: Fungus on January 30, 2023, 08:11:55 pm ---Maybe @Dave could do a video calling them out.  :popcorn:

--- End quote ---
Please no.
The ex Rigol seller found this.

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