If you have a DAQ board you can route the Frame Start signal through RTSI to it (using the IMAQ Trigger Drive VI), and wire the trigger signal to another input on the DAQ board. Then you can read both the RTSI line and the input port and graph them.
If you don't have a DAQ board, you can route the Frame Start signal to an External Trigger output and then wire that back into the IMAQ board and read the value, along with the trigger. They'll both be boolean values, so you'll have to do some logic to convert it to 0s and 1s.
Hope this helps-
Julie
