Author Topic: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown  (Read 10280 times)

0 Members and 1 Guest are viewing this topic.

Offline EEVblog

  • Administrator
  • *****
  • Posts: 28671
  • Country: au
    • EEVblog
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #25 on: July 03, 2017, 11:24:23 pm »
VGA output is entirely reasonable - it's the composite that's really strange (assuming that's what that yellow phono/RCA socket is).
Owon have "previous" for terrible DMM designs. I really can't see how anyone thought it made any sense to include one in a scope like this, less so with the inputs on the back.

It's the latest craze of "5 in 1" etc feature scopes. They thought one-up other in marketing by adding an actual multimeter input instead of just a software multimeter.
 

Offline JoeN

  • Frequent Contributor
  • **
  • Posts: 984
  • Country: us
  • We Buy Trannies By The Truckload
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #26 on: July 05, 2017, 03:20:38 pm »
Just looked up the NEC UD2-4 relay at Digikey. Twelve types. No stock. Photo shows NEC but the manufacturer is listed as Kemet.

Kemet bought them out recently.
Have You Been Triggered Today?
 

Offline maxwell3e10

  • Frequent Contributor
  • **
  • Posts: 334
  • Country: us
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #27 on: July 05, 2017, 08:48:40 pm »
It looks like HMCAD1520 can sample 4 channels in precision mode at 100 MSPS. Since they use one chip per channel (to get 1 GSPS in 8 bit mode), I wonder if they sample the same channel 4 times in 14-bit mode, maybe squeeze a bit more SNR.
 

Online Smokey

  • Super Contributor
  • ***
  • Posts: 1567
  • Country: us
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #28 on: July 06, 2017, 06:39:40 am »
Dave should add a stopwatch in the background of the fast speed reassembly.  I'm always interested in the amount of time it takes to put stuff back together.  That's typically the point where I regret taking something apart.
 

Offline Brumby

  • Supporter
  • ****
  • Posts: 8865
  • Country: au
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #29 on: July 06, 2017, 06:03:34 pm »
Dave should add a stopwatch in the background of the fast speed reassembly.  I'm always interested in the amount of time it takes to put stuff back together.  That's typically the point where I regret taking something apart.

.... when you use a sundial?

I can understand the feeling.
 

Offline analognoise

  • Contributor
  • Posts: 5
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #30 on: July 07, 2017, 04:01:55 am »
What is up with the isolation slots on the DMM portion? Dave mentioned them, but could someone (Dave?) elaborate?
 

Online thm_w

  • Super Contributor
  • ***
  • Posts: 1047
  • Country: ca
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #31 on: July 07, 2017, 05:04:18 am »
What is up with the isolation slots on the DMM portion? Dave mentioned them, but could someone (Dave?) elaborate?

https://electronics.stackexchange.com/questions/74244/why-route-air-gaps-for-voltage-isolation-on-pcbs
 
The following users thanked this post: analognoise

Offline WackyGerman

  • Regular Contributor
  • *
  • Posts: 209
  • Country: de
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #32 on: July 07, 2017, 11:58:45 pm »
I am not impressed of that scope . The build quality is awful , the software and the multimeter are bad jokes . Would really prefer the RTB 2000 series from Rohde & Schwarz even with the glossy screen which I a not a real fan of . VGA output is also old fashioned , the HMO Compact Series offered DVI output and the design of these are some years old . There are absolutely no points to buy this scope , even for half the price  :--
 

Offline tronde

  • Frequent Contributor
  • **
  • Posts: 310
  • Country: no
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #33 on: July 08, 2017, 01:24:31 am »

The VGA output is puzzling. Is there really anybody who'd want that?  :-//


Makes really good sense in school setting together with a projector.
 

Offline maxwell3e10

  • Frequent Contributor
  • **
  • Posts: 334
  • Country: us
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #34 on: July 08, 2017, 03:05:29 am »
There are absolutely no points to buy this scope , even for half the price  :--

If you don't care about vertical resolution, there is no point. If you do, I would challenge you to find one even at twice the price with even 12 bit.
 

Online Smokey

  • Super Contributor
  • ***
  • Posts: 1567
  • Country: us
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #35 on: July 08, 2017, 04:34:37 am »
So that brings up an interesting question.  Say you want 12bit (or higher) high speed sampling, but don't need a full blown oscilloscope.  What is the best lower cost option in this price range for a data acquisition system with similar specs but not the front end or extra fluff like multi-meter and ARB?
 

Offline maxwell3e10

  • Frequent Contributor
  • **
  • Posts: 334
  • Country: us
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #36 on: July 08, 2017, 06:24:17 am »
Picoscope 5000 is a USB scope with somewhat similar specs. Beyond that, there are various data acquisition cards from National Instruments, Gage applied and others.
 

Online Smokey

  • Super Contributor
  • ***
  • Posts: 1567
  • Country: us
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #37 on: July 08, 2017, 08:38:35 am »
... there are various data acquisition cards from National Instruments, Gage applied and others.

.... This was more what I was thinking.
 

Offline maxwell3e10

  • Frequent Contributor
  • **
  • Posts: 334
  • Country: us
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #38 on: July 08, 2017, 05:17:46 pm »
... there are various data acquisition cards from National Instruments, Gage applied and others.

.... This was more what I was thinking.
Those are generally more expensive, $5k and above, for high bandwidth devices. On the other hand, the USB scopes (Picotech, TiePie) are comparable in price ($1-2k). They actually use the same ADC chip as the OWON scope. Dave did a teardown of the Picotech 5000 a while back, it showed one ADC for 4 channels, while XDS3202A apparently has dedicated ADCs for each channel. Plus you get all the knobs, display and (optional) battery- a better deal than a USB scope.
 

Online nctnico

  • Super Contributor
  • ***
  • Posts: 16828
  • Country: nl
    • NCT Developments
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #39 on: July 09, 2017, 01:11:32 am »
The VGA output is puzzling. Is there really anybody who'd want that?  :-//
Makes really good sense in school setting together with a projector.
And how about connecting a framegrabber so you can record signals changing over time?
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Online JPortici

  • Super Contributor
  • ***
  • Posts: 2506
  • Country: it
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #40 on: July 09, 2017, 01:13:36 am »
... there are various data acquisition cards from National Instruments, Gage applied and others.

.... This was more what I was thinking.
Those are generally more expensive, $5k and above, for high bandwidth devices. On the other hand, the USB scopes (Picotech, TiePie) are comparable in price ($1-2k). They actually use the same ADC chip as the OWON scope. Dave did a teardown of the Picotech 5000 a while back, it showed one ADC for 4 channels, while XDS3202A apparently has dedicated ADCs for each channel. Plus you get all the knobs, display and (optional) battery- a better deal than a USB scope.

but you don't get to use the exceptional picoscope software suite and you are stuck with wathever spaghetti they cooked inside the owon
 

Offline maxwell3e10

  • Frequent Contributor
  • **
  • Posts: 334
  • Country: us
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #41 on: July 09, 2017, 04:11:44 am »
but you don't get to use the exceptional picoscope software suite and you are stuck with wathever spaghetti they cooked inside the owon

I haven't used the Picoscope very much, so can't comment on the "exceptional" software. It does have API functions that can be used for real-time data analysis on a PC, so its more like a data acquisition system. For diagnostic applications of a scope for me having real physical knobs even with somewhat deficient user interface is better than software controls.
 

Online JPortici

  • Super Contributor
  • ***
  • Posts: 2506
  • Country: it
Re: EEVblog #1004 - Owon XDS3202A 14bit Oscilloscope Teardown
« Reply #42 on: July 09, 2017, 08:42:13 am »
Recent updates modified the user interface to be more 'touch screen friendly' and i have to say it's much better to use with a mouse too.

At work i have a very long desk, which is divided as such: colleague - final test area - soldering area - me, so the board is always near my computer. It's very convenient to have the data already on the computer when i need it. Also big screen, etc.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf