CTB-100 / AVT-8710 SDI mod?
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I've been lurking around in this forum for some time. Especially in the realm of VHS digitization. But I have been confused regarding the TBC's. If the magic happens in the A/D converter and the FPGA, is there any use for the D/A converter other than providing for another needless conversion in our precious digitization chain?
Is there any reason not to use the digital data that feeds into the encoder (which is in beautiful ITU-R BT.656 spec), and feed it into a SDI serializer like the CLC020? I'm having a hard time sourcing a CTB-100/AVT-8710 so I have not been able to try this out unfortunately, but I'm curious how this would work out. |
Interesting question.
The FPGA is bitlocked, so that hurdle may have to be overcome first. You can't even learn which it is, because the chips have all been sanded (defaced). I'm not sure if you can just stick SDI out in place of the D>A, as it's expecting a D>A. My knowledge in these areas gets thin, but I wish you luck on it. BTW, I have a green AVT-8710 in the marketplace forum: http://www.digitalfaq.com/forum/marketplace Also a "clone" (same chipset). What you don't want is the black AVT-8710, or "black" clones using the same chipsets. |
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Current value? Not really. You won't be able to track down those components, either easily or at all. Notice his RAM comment. When Cypress changed RAM, something changed in the AVT-8710. This is why the black units are terrible. While it could be that something changed in the FPGA, it is more likely RAM conflicts. So you can't just willynilly change out components for "the same" (not AT ALL the same) chips. Cypress never fixed this, and ceased TBC production because the chips needed were no longer fabbed (arguably the chips needed quit being available in 2009, seeing as how 2010+ units were flawed). And you can't get at the FPGA because of the bitlock. The whole "black AVT-8710" issue sucks, but that's what it is. Those units actually cause dropped frames. Ironic, huh? Most black unit buyers learn it the hard way, or just don't pay attention to their captures (ghosting, frame sticking, loss of audio sync, combo thereof). Quote:
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