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About Picos' Sampling Rate
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balnazzar:

--- Quote from: Anthocyanina on October 29, 2022, 07:29:16 pm ---
Yeah, I've read some of that, and it's undeniable that the AD2 is not good for low level signals, but it's still a really good general purpose tool. It could be that you very often need to look at signals under 200~500mVpp and in that case, absolutely, the AD2 will not be great for that. I need to look at very small signals just ocasionally and that would be another use case for one of my other oscilloscopes, but more often than not I'm working(or playing :P) with signals above 500mVpp and under 20MHz, and for those cases, the AD2 feels great to use, not to mention that with it being not only an oscilloscope, i get even more non-oscilloscope stuff done with it, like the pattern generator and logic analyzer at the same time to work on diy digital circuits, which you can also power from the AD2 supplies, that would require a lot more space with separate instruments, so there's also that convenience. I guess i'm more curious about what you do that will require really good performance at low mV/ settings so often that the AD2 becomes a bad purchase

--- End quote ---

That's true. The problem is that with the BNC adapter it's close to 500 eur. For a device with all those limitations, it's a bit too much. It's more than 1054Z, and on par with 1104x-e. I hear that before covid it could be had for like 199. At such a price, I would have never returned it.
On the positive side, it's silent and portable.

As for the specific application that left me dissatisfied, I was looking at a signal outputted by a high frequency accelerometer. TBH usually I look at it with a siglent sds5000 at the university, but I was triggered by the fact that the day after having had the discussion I linked above, I brought the AD2 with me at the lab and indeed it proved to be useless as soon as the signal degraded below ~20-30 mVpp.
adam4521:
For the Picoscope, consider the 2205A MSO. They come up reasonably often on EBay and you should be able to get one for less than £200. A bit more memory and performance than 2205A, plus the extra digital channels. I have one and it’s great for decoding. Some idiosyncrasies though, a weird one is that there is no trigger hold off, which apparently people have been asking for years. So not perfect, but a good, convenient tool.
balnazzar:

--- Quote from: adam4521 on October 29, 2022, 09:58:18 pm ---For the Picoscope, consider the 2205A MSO. They come up reasonably often on EBay and you should be able to get one for less than £200. A bit more memory and performance than 2205A, plus the extra digital channels. I have one and it’s great for decoding. Some idiosyncrasies though, a weird one is that there is no trigger hold off, which apparently people have been asking for years. So not perfect, but a good, convenient tool.

--- End quote ---

If you buy it new, it costs more than twice the analog-only 2205A (if you can find it)... I'll see if I can find it on ebay, but given the scarcity, I don't have much hope...
balnazzar:

--- Quote from: jasonRF on October 29, 2022, 09:39:38 pm ---florentbr’s vds1022i software is at

https://github.com/florentbr/OWON-VDS1022

I have not used it, since I do not have one of those scopes.   But the python example he gives looks very convenient to use!   

Jason

--- End quote ---

The drop-in software is by itself better than the original one. Now I'm try to delve into the python side..

Thanks for having mentioned it :)
nigelwright7557:
The scope takes in a fast burst of data from the A2D to RAM.
Then sends it to PC via USB (speed at whatever standard is used 2.0 etc)
Then scope takes in another sample etc.
So however slow USB is it will still work.
Obviously too slow will delay display on screen.
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