4 channel Portable DSO

So how long before you guys make a FEZ version of this :wink:

http://www.ebay.com/itm/4-channel-Portable-Digital-2MB-USB-Disk-Storage-Oscilloscope-DSO203-ARM-DSO-NEW-/260894476529?pt=BI_Oscilloscopes&hash=item3cbe85c8f1

I am shocked that they give the skiz on it.

I am the fortunate owner of such device. It works well.
However, the graphical interface is a huge pain to use and get used too.
Got mine from seeedstudio.

The hardware and software are opensource so you can improve it :wink:

Also they come not calibrated, and the process to do so takes times. And everytime you upgrade the software, you loose you calibrations…

More data here : http://www.seeedstudio.com/wiki/index.php?title=DSO_Quad

I’ve been eyeing one of those as a potential b’day present request :wink: What is required in the calibration process? If I don’t already have a bench scope is it going to be impossible to calibrate this one? Would this meet most hobbyist needs or should I go ahead and spring for a bench or PC model?

There is 2 sort of calibration:

  • The probe calibration, which is done by hooking up the output signal generator to an analog input, by turning some capacitors. This takes a little time and do not require other tools.
  • The measurement calibration : basicaly you need a standard voltmeter and an adjustable power source.

Both processes are explained in the documentation:
http://www.seeedstudio.com/forum/download/file.php?id=671

A friend just got me DSO Nano v2 for bday. Neat little device!

By the way, just seen on this ebay page “providing 72Mhz analog bandwidth”.
It is false. It is a 72MS/s ADC , that a big difference ! You can expect about 10Mhz bandwith.

Would this be useful in reverse-engineering an IR protocol?

Better use a specialized toy, for 10 times less !

or a real logic analyser:

As you can see in the link:
http://www.seeedstudio.com/wiki/index.php?title=DSO_Nano_v2

It’s capable of only

[quote]
Analog bandwidth 0 - 200KHz
Max sample rate 1Msps 12Bits [/quote]

Now I see this topic is about the “quad”.

[quote]or a real logic analyser:
http://www.seeedstudio.com/depot/open-workbench-logic-sniffer-p-612.html?cPath=174
[/quote]
I have actually used SUMP the last week. Ran the logic analyser part on my Sparten3 dev board. It worked OK. I debugged what I needed to debug. But the software can do with a rework.

Zooming in is a pain as the data moves during zoom.
Triggers don’t work when set to 256K buffer.

But it worked.

Might be worth while to write a client in C# for the board…

Not likely to use SUMP myself. I don’t have anything else that uses Java, and not particularly interested in installing (and having to keep updating) a JVM just for one application. Of course, in fairness, I probably have a slight bias towards .NET, given who I work for. :slight_smile:

The short-term cheap solution for me is to just capture the data with the IR receiver, and copy the buffered uint values into Excel. I can write a formula to convert the high values to 1 and the low values to 0, then analyze from there. It’s more work that way, but it won’t require me to buy any new equipment.

If you already have an iPad, this looks like a cool offering.