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it's all different sequences, so I do need the different channels.
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Ok.
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I have checked the Samtec interfaces and it does not seem obvious to get that up and running quickly. This should be a quick-development initial prototype, so I think I will buy one Stratix IV GX with the 8 transceivers to SMA and figure out if that can do what I want. After that I will bug you again with the synchronization :)
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The Samtec interfaces are just breakout cables. You just plug them in :)
Cheers,
Dave