[Coco] RGB to VGA boards, test equipment needed

[Kandur]

Thanks a lot Tormod.
Great photos, seeing is believing.
Please take a look at the specs and schematic here:
http://tinyurl.com/pjdgv9x

Is it dc coupled?

Kandur

Monday, September 7, 2015, 12:16:59 AM, you wrote:
> On Sun, Sep 6, 2015 at 10:19 PM, Kandur wrote:
>> Would these pocket oscilloscopes do for checking video signals?
>> If yes, wich one is better? Are there any others under $100?

>> http://tinyurl.com/p9jx2ec

>> http://tinyurl.com/ommymqs


> Maybe better than (much qualified) speculation :)
> This is a screenshot from a DSO201 checking the PAL video output on a Dragon:

> http://pasteboard.co/skyrH6L.jpg

> You can't see the colour burst, but at least you can see it is a video
> signal, and you can see where the sync level is.

> The next one is from a prototype of the DSO203, it has higher sample
> rate but struggles with its analog bandwidth and gain (should be
> better in the final products):

> http://pasteboard.co/skWp1GG.jpg

> So, as it has been said here, these are not great for video signal
> analysis, and you're better off getting an old 20MHz analog scope. But
> these pocket scopes are very handy for quick field testing in the
> lower frequencies. And fun gadgets, some of them have open-source
> firmware and you can hack and modify. The DSO201 is just an STM32
> microcontroller with an analog front-end, the DSO203 also has a FPGA
> for the signal capture. I didn't know about the DSO112, but it looks
> like a repackaged DSO201.

> Regards,
> Tormod