HELP! HDMI splitter to work with ATEM Television studio

My goal is to:

Output HDMI from iMac to HDMI splitter. One HDMI output to a video projector, the other HDMI output to the ATEM tv studio. I have tried 5 different splitters with NO success. Signal only goes to the video projector...nothing to the ATEM.

Please help!!!

Recommendations?

hello, what do you have Setup at the TVS and what do you have setup at your imac?
the projector works with all Parameter from the imac - the TVs must set to the right format and frequenz.

Start by connecting directly from your iMac to the TVS to know that the signal are OK.
If that works but not with the splitter it could be that your iMac sense the projector and change the output to what the projector wants.

Probably the HDMI handshake stuff of the projector fools the iMac to switch resolutions. Try plugging the TV studio in Port 1 in the splitter and/or set the resolution/refresh rate manually.

Might also be that the projector only supports 720 and you are running the ATEM in 1080i and therefore the iMac handshakes to the lowest common determinator on the split which then is the projector.

Don't forget about EDID. We had issues with our ATEM and a plasma display until we installed
this device:
http://www.gefen.com/kvm/ext-hdmi-edidp.jsp?prod_id=8005
We saved the EDID of our ATEM in the device.

Thanks for the quick answers. Unfortunately the splitter died for some reason before I could tech it out. Now I will have to wait for another splitter before trying your solutions.

I would say that the dying splitter was the problem, but I tried four other ones before....will update as soon as I have a replacement

Don't forget about EDID. We had issues with our ATEM and a plasma display until we installed
this device:
http://www.gefen.com/kvm/ext-hdmi-edidp.jsp?prod_id=8005
We saved the EDID of our ATEM in the device.

Definitely going to try this....this may be the missing key. Thanks SO much!

You need to use a HDMI Splitter that is EDID and HDCP compliant. Also, if you are running two different resolutions on 2 TVS or projectors the splitter defaults to the lower resolution. I would recommend checking KVMSwitchTech as the offer a wide range of HDMI Splitter solutions. I have used a few of their units and they work pretty well.

Most important is to first get the signal to the ATEM Television Studio. Connect the Mac Mini to the HDMI-splitter, and the straight to the mixer. Change framerates and resolution until you get it right. And then you connect the projector to the splitter. The projector is going to most probably show whatever signal you are sending it anyway!