I am using the DLP4500 GUI in pattern sequence mode with a video source streamed from a PC over HDMI. Everything works correctly but I want to confirm the limits of triggering out in this mode. In my experience the trigger out isn't received upon changing the image sent to the DLP4500 over HDMI but upon the pattern exposure duration. I have a large amount of images to stream to the DMD and I would like the trigger out to correspond to the change in image at the DMD. Is this function only available using the flash memory?