By default, the camera will reject input pulses until the last triggered image has completed the readout step on the sensor. This may limit the maximum achievable trigger frequency on some cameras when compared to maximum non-triggered FrameRate.
To address this situation, the camera also supports TriggerOverlap functionality. When TriggerOverlap is enabled, this allows the camera to accept an input pulse before the readout step is complete. This allows the camera to be triggered at frequencies closer to the maximum non-triggered FrameRate.