It depends on how closely synchronized the two images need to be. The easiest way to do it would be to trigger both 1411s at the same time. However, by doing this you get the next available image from each camera, so there could be as much as a 30 ms delay for NTSC cameras. It would be better to also synchronize the 2 cameras together (called genlocking). This insures that the cameras are sending images to the frame grabbers at the exact same time.
If nothing else, you can call IMAQ Snap.vi twice inside your program and get two images at the same time. This will work well if you don't need exact precision, but since it is based in software, there is no gaurantee the images will be acquired at the same time.
