- Posts: 1
- Joined: Mon Oct 18, 2021 7:10 pm
- Real Name: Nicholas Wautier
I've seen this happen a few times, and it is now leading me to believe that the BlackMagic Design VideoHub 12x12 doesn't re-clock and signal-boost for every output on their non-clean switch model.
Situation 1:
This weekend, I was running a larger show where all 12 outputs of my video hub were needed, with 4 of those outputs displaying the same input, routed to different areas: Broadcast, Record, TV Chain, and Projector Chain. The projector and TV chains each had their own SDI 1x8 Distribution mini-converter. The strange thing is, when everything was connected, the 2 projectors (and their 1x8 distro) lost their signal. To test, I began by swapping the mini-converters, and it quickly became apparent that in any config, the projectors worked just fine whenever the TV distros were unplugged. As soon as the chain on the TV end was extended, the projectors went out again.
This leads me to think that despite being connected to different outputs on the VideoHub, electronically both were essentially daisy-chained or "t-connector" split.
Situation 2:
An install I've spent a lot of time in uses a SmartVideohub to send 2 MEs and 4 Auxes to various displays around the building. I don't have any idea what the wiring looks like beyond the hub, but I have had random signal dropouts if I send the same output to too many destinations at the same time. As a workaround, I have set one of the auxes to follow program output within the upstream switch, so that I have a 2nd source to use whenever we reach a threshold when dropouts become a problem.
My question is twofold. First, am I correct in assuming that outputs patched to the same input are essentially "patched" together, and second, is this still the case on the newer, Clean Switch edition of the VideoHub family?
Situation 1:
This weekend, I was running a larger show where all 12 outputs of my video hub were needed, with 4 of those outputs displaying the same input, routed to different areas: Broadcast, Record, TV Chain, and Projector Chain. The projector and TV chains each had their own SDI 1x8 Distribution mini-converter. The strange thing is, when everything was connected, the 2 projectors (and their 1x8 distro) lost their signal. To test, I began by swapping the mini-converters, and it quickly became apparent that in any config, the projectors worked just fine whenever the TV distros were unplugged. As soon as the chain on the TV end was extended, the projectors went out again.
This leads me to think that despite being connected to different outputs on the VideoHub, electronically both were essentially daisy-chained or "t-connector" split.
Situation 2:
An install I've spent a lot of time in uses a SmartVideohub to send 2 MEs and 4 Auxes to various displays around the building. I don't have any idea what the wiring looks like beyond the hub, but I have had random signal dropouts if I send the same output to too many destinations at the same time. As a workaround, I have set one of the auxes to follow program output within the upstream switch, so that I have a 2nd source to use whenever we reach a threshold when dropouts become a problem.
My question is twofold. First, am I correct in assuming that outputs patched to the same input are essentially "patched" together, and second, is this still the case on the newer, Clean Switch edition of the VideoHub family?