Author Topic: New OWON 14bit XDS3202A Oscilloscope  (Read 15820 times)

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Offline fourtytwo42

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #50 on: May 31, 2017, 09:23:37 am »
It's good they have responded - and extra brownie points for doing it point-by-point.

I wonder how much will be changed - and how quickly?
I got a reply too regarding some firmware problems with a then new VDS1022I a year ago, since then silence and no new firmware so don't hold your breath on this one either!
 

Offline abraxa

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #51 on: May 31, 2017, 09:47:35 am »
Quote
1. Package box shows 12-bits but actually 14-bits resolution on device label.
RE: Yes, it’s our package problem, we have start plan to change it.
To me, this reads as if they initially only were doing 12-bit interpolation but someone said "if we can turn 8 bit ADC data into 12 bit, can't we also do 14 bit?", so the specs (and software) were changed but the device packaging was overlooked.

Quote
12 bit makes a difference in the noise level. It is one of the very few high resolution scopes and is a great deal at around $450 compared with a comparable data acquisition card.
If you get true 12 bit, sure. But I wouldn't trust this kind of company to either use a real 12-bit ADC or perform the required amount of oversampling to approximate them with an 8-bit ADC. Sure, the scope says it uses 12-bit values (and probably shows them as such) but how accurate are they?

It's even worse when claiming 14 bits of resolution when using an 8-bit ADC and not doing the required oversampling, which they are:
Quote
10. Single channel on 14-bit resolution, sample rates at 100MS/s.
RE: Yes, so it does. Limited by hardware, we could implement 1GS/s sample rate only at 8-bits mode.

So in essence, they use an 1GS/s 8-bit ADC and claim they can deliver 14 bits of resolution when performing 10x oversampling. However, that would only yield 1.5 additional bits, so they're lying. For an additional 6 bits of resolution, they'd have to perform 4096x oversampling. Quite the difference, I'd say.
« Last Edit: May 31, 2017, 09:49:08 am by abraxa »
 

Offline StillTrying

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #52 on: May 31, 2017, 11:06:54 am »
"3 We are still testing on how to hold the thin device body without losing stability like to expand stool size."

They're going to fill it up with what ? :o  Perhaps they could just release a much heavier version of the firmware.

"9. Slow response for touch screen
RE: It’s a main issue for various oscilloscope manufacturer to study how to improve touch screen experience these years."


Yep, it doesn't matter if the UI doesn't work properly, it's not as if the user is trying to concentrate on something else while they're using it.

Send it back.

And they should really make the samplerates and resolutions more clear. Currently it is completely misleading:

All the 'affordable' LOL, scope manufacturers are the same.

« Last Edit: May 31, 2017, 11:08:31 am by StillTrying »
CML+  That took much longer than I thought it would.
 

Online mikeselectricstuff

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #53 on: May 31, 2017, 05:23:28 pm »
It's good they have responded
The issue is not so much the obvious problems, but the fact that they needed someone else to tell them.
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Online nctnico

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #54 on: May 31, 2017, 07:00:33 pm »
So in essence, they use an 1GS/s 8-bit ADC and claim they can deliver 14 bits of resolution when performing 10x oversampling. However, that would only yield 1.5 additional bits, so they're lying. For an additional 6 bits of resolution, they'd have to perform 4096x oversampling. Quite the difference, I'd say.
That doesn't have to be the case. There are ADCs out there which offer higher resolution at lower speeds. Dave should do a teardown to see what is inside!
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 
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Offline EEVblog

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #55 on: May 31, 2017, 11:37:26 pm »
So in essence, they use an 1GS/s 8-bit ADC and claim they can deliver 14 bits of resolution when performing 10x oversampling. However, that would only yield 1.5 additional bits, so they're lying. For an additional 6 bits of resolution, they'd have to perform 4096x oversampling. Quite the difference, I'd say.

No, I'm pretty sure they are using the Hittite HMCAD1520, a switchable 8/12/14 bit converter
http://www.analog.com/media/en/technical-documentation/data-sheets/hmcad1520.pdf
The sample rate and bit specs match this chip precisely.
 

Offline EEVblog

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #56 on: May 31, 2017, 11:39:31 pm »
It's good they have responded
The issue is not so much the obvious problems, but the fact that they needed someone else to tell them.

Indeed.
And all those issues were found with me doing a single take 30 minute first impression straight out of the box playing around with no prep or test plan.
Trivial stuff.
 

Offline Brumby

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #57 on: June 01, 2017, 01:14:42 am »
I'm not arguing that - I'm just saying that it was nice to get a detailed response.

The real question I have is why the heck they would send out such a unit in this state?  From their response to Dave, it would seem they were aware of a couple of the issues - issues that one would not expect to see in a product brought to market.

I get the feeling that they sent Dave a prototype for him to pick it apart and tell them what they need to change for it to become a better candidate for commercial release.  The free EEVblog consultancy, as it were.  However, I feel that there would be a lot more on the list if Dave sat down and did a solid review.

I wonder what else Dave might receive further down the track?
« Last Edit: June 01, 2017, 01:17:47 am by Brumby »
 

Offline EEVblog

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #58 on: June 01, 2017, 10:51:38 am »
I get the feeling that they sent Dave a prototype for him to pick it apart and tell them what they need to change for it to become a better candidate for commercial release.  The free EEVblog consultancy, as it were. 

It's for sale:
http://www.batronix.com/shop/oscilloscopes/Owon-XDS3202A.html
https://www.amazon.com/OWON-XDS3202A-Multi-Touch-Oscilloscope-resolution/dp/B01MXVNMFB
http://www.ebay.com/itm/OWON-XDS-XDS3202A-Measurement-200Mhz-1G-Storage-Oscilloscope-12-bits-ADC-40M-re-/222237318097
 

Offline sibeen

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #59 on: June 01, 2017, 01:40:17 pm »

It's for sale:


Jeez, Dave. Should you really have put it on ebay?

:)
 

Offline thm_w

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #60 on: June 01, 2017, 07:53:07 pm »
No, I'm pretty sure they are using the Hittite HMCAD1520, a switchable 8/12/14 bit converter
http://www.analog.com/media/en/technical-documentation/data-sheets/hmcad1520.pdf
The sample rate and bit specs match this chip precisely.

$83/ea, not that bad. Surprised not many scopes have used it, it was released back in 2013.
Pico 5000 series has it (https://www.eevblog.com/forum/blog/eevblog-521-picoscope-5000-usb-oscilloscope-teardown/), retail is $1,000 USD, release 2013.
HMCAD1511 is in your 1054z and $46/ea.
 

Offline Brumby

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #61 on: June 02, 2017, 06:40:53 am »
I get the feeling that they sent Dave a prototype for him to pick it apart and tell them what they need to change for it to become a better candidate for commercial release.  The free EEVblog consultancy, as it were. 

It's for sale:
http://www.batronix.com/shop/oscilloscopes/Owon-XDS3202A.html
https://www.amazon.com/OWON-XDS3202A-Multi-Touch-Oscilloscope-resolution/dp/B01MXVNMFB
http://www.ebay.com/itm/OWON-XDS-XDS3202A-Measurement-200Mhz-1G-Storage-Oscilloscope-12-bits-ADC-40M-re-/222237318097

Oh dear.

Wonder what Rev 2 will be like?
 

Offline abraxa

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #62 on: June 02, 2017, 06:50:25 am »
So in essence, they use an 1GS/s 8-bit ADC and claim they can deliver 14 bits of resolution when performing 10x oversampling. However, that would only yield 1.5 additional bits, so they're lying. For an additional 6 bits of resolution, they'd have to perform 4096x oversampling. Quite the difference, I'd say.

No, I'm pretty sure they are using the Hittite HMCAD1520, a switchable 8/12/14 bit converter
http://www.analog.com/media/en/technical-documentation/data-sheets/hmcad1520.pdf
The sample rate and bit specs match this chip precisely.
Interesting, I didn't know such ADCs existed. I take back the liar then and stand corrected.
 

Offline BU508A

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Re: New OWON 14bit XDS3202A Oscilloscope
« Reply #63 on: June 02, 2017, 09:15:04 pm »
Wonder what Rev 2 will be like?

You'll never know. And that is one of the reasons, I do not trust at all this kind of gear.
“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 


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