I just attended a scholatic team tournament this weekend where one of the tie-break measures used was USATx2.

It may have been explained and I probably wasn't paying attention, so I went to my old friend google.  I struck out.

Can anyone tell me where I can find some information explaining this tie-breaking paramter?

Thanks!

Well, USAT is the United States Amateur Team competition. 

I'm not 100% sure, but I think their system works like this:  the team score is based on its match score - a 4-0 win counts the same as a 2.5 - 1.5 win.  Tiebreaks come in, obviously, to break ties.

The first tiebreak is the games score, so here each team's game scores in the matches are totaled and the highest wins.  I'm assuming this would be "USATx1" and the second tiebreak is adding all the games scores of all the teams one team played (the concept is the highest total means you played the strongest opposition in terms of their results).  I'm guessing this would be "USATx2" but don't bet the deed to your ranch that I'm right!