Here is an interesting HP application note:
AN 1304-1 page 8, TDR example 5 and 6 give star configurations terminated
with (no 10 pF caps - or similar values) 100 resistors (it is assumed that
there is no reflections from the load).
It would be interesting to know if you had to change Zo of separate traces
to minimize reflections at the place where separate star traces are
"branching out" or the main trace (trace from the source to the place of
branching) was short enough so the above didn't have any importance?
PS: Also, I would like to ask you for a copy of your Design Con paper
Josip Popovic email: email@example.com
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