We have the same stability problem with three Sony DigiBeta DVW decks (2 players and 1 recorder). When we route their SDI output through the VideoHub, the resulting signal is totally unstable and unusable, even when simply routing them to a monitor. When we by-pass the VideoHub, the deck output is fine. Previously, the decks were connected to a Leitch SDI router for 5 years, without any problems.
We also have Sony HD decks connected to the VideoHub, and they seem “compatible”, the resulting signal is stable.
Since we are apparently not alone, I would think the VideoHub has a problem with Digital Betacam decks.
BM support says that it can’t be the VideoHub, because it is in use across the globe, and my machines must be off-spec. All three of them???