Q. Can the MTPAV be connected to both a Mac and PC at the same time and are there any limitations.?

A. The MTPAV can be connected simultaneously to a MAC and a PC at the same time and if the front panel switch is in PC mode, both of the computers have full access to all of the features of the MTPAV

Q. Does the BNC video in jack accept composite video signal as well?

A. No, it will only accept Video Sync in (Blackburst). It will not take composite video or 48 K word clock inputs.