Hi Chris,
Well, the TSS400 does not "see" anything.
It only converts the signal from coax to ip. So you just have to put in the right frequencies into the tss400.
The setup for the satellite is still done in tvheadend or what ever you want to use.
So if your satellite is pointing at Optus D1 @ 160E, then that should work.
dont think it supports more than 1 lnb.
Kind regards
Pablo