Hello Ron,
Welcome to Austech.
Depends on the type of LNB and how the outputs are configured and how your TV switches polarities.... more info needed.
I'm not familiar with a C-Band LNB with 4 outputs (or a TV with direct satellite tuner connection)... are you sure it's not Ku band?
If you have separate H/V polarities output from the LNB, then connecting them to a multiswitch will provide a single connection to a tuner, but again, it depends on how your tuner switches polarities and type of LNB it works with.
Ie: 13/18 volts switching, 22kHz DiSEqC, etc
EDIT: There are a few different satellites named Astra, Ku and Ka bands (no C band)... and none receivable in Australia.
Which Astra satellite are you referring to, and where are you located, Ron?
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