[Coco] RGB to VGA boards, test equipment needed

[tim franklinlabs.com]

   It's still only 1Mhz... Not good for video.

     On September 7, 2015 at 11:01 AM Kandur <k at qdv.pw> wrote:
     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
     --
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