High Speed Capture Inputs

Active High, Active Low, Low-to-High Edge, and High-to-Low Edge modes define the state of the input signal that results in a high-speed capture event. Setting the trigger input mode to Active High means that an active high input causes a capture to occur. Conversely, Active Low means that an active low input causes a capture to occur. Notice that if the signal is already at the specified level when high-speed capture is enabled, the capture occurs immediately. Low-to-High Edge requires that the signal make a transition from low to high to trigger a capture; High-to-Low Edge requires that the signal make a transition from high to low to trigger a capture. In all of these modes, the input has latching behavior, meaning that after the high-speed capture input is enabled, if the input signal ever becomes active, the high-speed capture status is true until the input is reenabled

Active High Digital Input and Active Low Digital Input modes allow you to configure the high-speed capture input as a simple digital input independent of the high-speed capture circuitry. In these modes the inputs simply reflect the current state of the input signal. The input does not need to be enabled or reenabled at any time in these modes