DSOQuadV2.6 RESOURCE(Update 2012/04/12)

Products & Technology DSO Quad
#281

Hi Pedro,

Wow! You’re doing a great job!

I was looking for a portable low cost oscilloscope and found DSO203. Looks like a good piece of equipment, but searching a bit I see there are quite some bugs and there is no real official change/fix log so hard to tell what of those has been fixed.

A one which looks a major one indeed to me is described in the latest (2012-02-10) review here:
seeedstudio.com/depot/dso-qu … ?cPath=174

Is it known? Has it been fixed?

Also I’ve seen that there are wrong units displayed for the frequency. Has it been fixed?

And I’ll use the opportunity to ask this: do you think those DSO203 sold on eBay are genuine? Like this one :
ebay.com/itm/ARM-V2-DSO203-D … 256acdec28

And I wonder why it seems like the developers don’t care and you have to fix all the bugs on your own?

Sorry for all the questions, just don’t want to end up with an expensive toy.

Thanks,
Dan

#282

Triggering is, I would say, a bit unreliable. I wouldn’t say it’s useless, just unreliable.
It doesn’t work consistently in all situations. That’s about it.
It works for me, in most situations.
The triggering is done in the FPGA, and there’s currently no way to rebuild that code without purchasing a licence, and that I would say is my biggest gripe about it.

I find it a bit more sad that the analog bandwidth has been “strangled” due to some bad hardware design choices. The digital processing part is actually superior but you can’t take advantage of it.

ps: This build has correct frequency units, yes.
The official one (still) doesn’t.

ps2: In the end, it’s a (very nice) expensive toy, yes.
You can’t compare it to a professional dso, but then again, how many good dso’s do you know of this size?

#283

Hi Pedro,

Thanks for your contributions. Last night I upgraded the s/w with the latest sys and fpga. The only thing to watch out is to download the app using zip, otherwise you get an error. Have not have a chance to do any measurement, but the upgrading worked perfectly.

With regards to the FPGA code compiler license how much does that cost? The thing is that for other open source s/w, the tools are also free. Then how would people deal with open source fpga source?

I am not sure if the community is willing to contribute to buy a license, but it is something to think about.

#284

There’s a thread about compiling the FPGA code: viewtopic.php?f=22&t=2021

FPGA programing is not even something I have any knowledge about :slight_smile:
I’ve only browsed the source code.

#285

Hello Kabron,

Do you have any new achievement of debug DSO with a ST-Link?
I want to try it but I’m afraid I will erase something in the ROM.

#286

Yay for the new releases.

Can you please post the sourcecode to the git repository ?

thx

#287

hi
I’m a student, i wanna research DSOQuadV2.6 but i can’t find lasted source code (APP 2.53, SYS 1.52, FPGA 2.61).
help me please

#288

viewtopic.php?f=22&t=1929 :wink:

#289

thanks but i need source code not firmware

#290

Yup - I never got a reply to this here on the forum or on Twitter.

New Topic Time I think…

#291

Greetings,

is there any effort to continuing refinements of firmware for V2.6 HW?

I have freezing of DSO when particular specific analog signal is measured (pulse-phase modulation), when I have frequency counter enabled for input on the right-hand side panel in GUI.

Though, it is inductive load (commutated DC motor), but driven by 19 V as maximum + modulated wave form. So I don’t believe the cause are voltage spikes, since DSO can handle 70 Vpp.

best,
vdm
.