here is the original mail i got from B;ackmagic design.
“We believe that this may be a grounding issue, similar to your
customer who tried to ground pins together. The current solution is
we have a small RS422 pin map cable, which so far has shown to solve
the problem in our testing. This will need to be attached to the back
of the Decklink card, and then the RS422 cable run as normal.
This problem will now be examined further in hardware/firmware and an
appropriate solution found.”
Pin out of the pin map cable is:
Cross pin 8 (Receive A) and pin 2 (Transmit A).
8 > 2
2 > 8
MacPro dual Quad 2,8 GHz – 16 GB RAM – Decklink Studio – FCP 6.05 – OSX 10.5.6 – G5 dual 2,0 GHz – 4 GB RAM – Decklink Extreme – FCP 6.05 – OSX 10.5.6