1. T:SWIC starts the whole process. It is typically set to event <45> (start of flattop) with a delay of a few milliseconds. (only because an uninitialized timer can also return a zero. i.e. Gotcha!)
2. T:SWIC34 is an 070 timer card (can generate up to 1024 events) that is triggered from the above event T:SWIC to generate the SWIC sample events <34> 070's are adjusted from application page M86, where T:SWIC34 can be selected.

In this example 5 <34> events will be generated.

3. Event 34 <34> is the typical event used for the SWIC sample event found on S43.

This is an example for the first SWIC out of the Tevatron, PSEP

<45> is the start of flattop and <36> is "Post Beam Sample Time" (S:PBST) and typically occurs sometime after flatttop.

4. After the "START" event has occured, each scanner will use the info found in the "SEQUENCE" window as to how to handle each "SAMPLE" event. The first sample event that occurs in a given cycle will use element zero (0), the next sample element one (1) and so on..... thus the name "SEQUENCE".
More info on SEQUENCE WINDOW
Image mapped Overview of S43