Event x: You can select blanking and windowing filters. Each dropdown item specifies a filtering interval. Most intervals are the same for up count and up-down count modes. Some up-down count intervals are different and are indicated with a UDM: prefix.
Event Thresholding after Filtering: Lets you choose one event for additional thresholding. That is, at least threshold number of events must occur before the event signal is passed to the HRTIM for action.