OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG

[Kurt_!]

I found this software, but I can't establish a connection.
https://github.com/seritools/owowon
The original software for my Owon works...
Does anyone have any ideas?

That would be a nice piece of software...

[foxchengzi]

Hello,on1kzb
Your unit does not have a signal‑generator function. I could only find teardown photos for the variants with a signal generator (models ending in S). There is another re‑badged OEM‑produced counterpart to the OWON 242S on the Chinese‑mainland market, the Victor VC240S. Partial teardown photographs of this device can be found using China‑based search engines. Its motherboard revision MB V3.3.2 is reasonably similar to your MB V3.3.1, so the missing component on your circuit board may be a 0‑ohm resistor. This conclusion is for reference only and I hope it helps you.
 

[mjklo]

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Hi,

Today I received my OWON HDS25S (25 MHz, 250 MSa/s, 2CH + Gen).

A couple of things I noticed:

* There is no included carrying pouch.
* Only one probe came with the kit.
* There are RMS, rise time, pulse width and other measurements that were not available on older FW versions of the HDS200 series.
* Screenshots can be taken in every mode (Oscilloscope, Sig. Gen. and DMM), although in Sig. Gen. and DMM modes the `save` key has to be pressed and held for about 5 seconds.
* The screenshots are vertically flipped (see attached screenshot).
* On the OWON website there is no entry for the HDS25 series, so there is no firmware available for this version.

It came with FW version V8.8.2 and SN starts with 2453.

I'm not getting an update either.
I can enter whatever I want in the last firmware field... nothing happens.
They'd rather release a new hardware version first!
Have you tested the bandwidth?
My device performs the same as the HDS272.(bandwidth)
Only the frequency counter goes up to 40 MHz.

Hi Kurt_!,

I don't have a function generator to test the bandwidth, but I found the following videos which review this exact model.





The first one measures the bandwidth at around 1:19:40 and the second at around 34:48. However, the bandwidth tests are inconclusive for me since I don't understand the language, and the videos aren't clear enough. Anyway, I wouldn't use this particular model above 10 MHz.

[mjklo]

Hi,

Today I received my OWON HDS25S (25 MHz, 250 MSa/s, 2CH + Gen).

A couple of things I noticed:

* There is no included carrying pouch.
* Only one probe came with the kit.
* There are RMS, rise time, pulse width and other measurements that were not available on older FW versions of the HDS200 series.
* Screenshots can be taken in every mode (Oscilloscope, Sig. Gen. and DMM), although in Sig. Gen. and DMM modes the `save` key has to be pressed and held for about 5 seconds.
* The screenshots are vertically flipped (see attached screenshot).
* On the OWON website there is no entry for the HDS25 series, so there is no firmware available for this version.

It came with FW version V8.8.2 and SN starts with 2453.

After using it for a while I must say that, at least for my use case, this is a very useful device, with very nice features. I mainly used it for low frequencies measurements.

One of the key features for me is the SCPI interface, which I mainly used for measuring the frequency response of filters. To do this I have written a Python script to set the signal generator to a fixed amplitude and vary the frequency across a list of logarithmically spaced values,  measuring the output of the filter with the oscilloscope probe. The resulting measured values are exported as comma separated values and plotted using GNU Octave.

Attached are some measurements made on the filter and the resulting plotted frequency response compared with the ideal and simulated response of the circuit.

[Thomas Ballantine]

Has anyone done any work to create a schematic of the HDS2102S? I pointed an AI at the update files and it claimed that only a tiny fraction of the LUTs are actually in use (500 out of 19600) and that the gateware seemed to have a 16K sample depth option in it that wasn't used. There's also enough RAM in the fpga that it might be possible to get at least a single channel 64K sample depth out of it with new gateware. Might be worth a look anyway.