Yamaha DTXpress/DTXplorer/DTXtreme

A couple of weeks ago I was posting a question about a quite unusual
effect with my hihat (DTXP III ST, HH65/TP65S) where sometimes trigger
signals got lost if a step on the hihat pedal was immediately followed
by a hit on the hihat pad. In the meantime I found out that for some
reason the trigger settings for the "pad type" had changed. Changing
them to "RHH" for example solved the problem. I also looked up the
standard settings for input 8 but I found the manual in that context
not really clear. My question: Does anybody know the optimal "pad
type" settings?

Thanks for any replies in advance
-Bongo-