[xazos79]

This site may - or may not - help : https://ozdigitaltv.com If you know the name of your local transmitter(s) it will help. I think Aus uses 7MHz rather than 8MHz DVB-T channels.

Ah, fantastic. This is is the transmitter my antenna is pointed to:
https://ozdigitaltv.com/transmitters/SA/420-Adelaide

Do i need to add a muxer for each frequency? Also, bandwidth is not given, i'll just leave at auto i'm assuming?

Thanks for you help.

Edit: ugh, there are predefined muxes to select for the network. I selected Adelaide Foothills and this added a bunch with different frequencies to the tower my antenna isn't pointing to. But it worked. Scans have come up. I'll continue on now! Thanks again.

[wrxtasy]

If my memory serves me correctly the Transmitter list for Australia is hopelessly out of date for TvHeadend configuration.
I just used Noggin Mini Guide HERE

And then just selected Generic-Australia (or similar generic) for the Transmitter and let all the Frequencies scan. Delete the ones that fail and remember to SAVE, everytime after changing anything on a any particular page.