Measurement time (Camera Sync Unit)
Use this the Meas. time output on the Camera Sync Unit to get a pulse that lasts for the whole capture time. The output will go low/high at the start of a capture and not go high/low until the end of the last frame. Measurement time applies only to captures, not to preview.
Set the TTL signal polarity to change the polarity of the signal. Negative means that the sync out signal is high until the start of the first frame when it will go low.