We understand that you want to be able to get all the channels when you connect to the Slingbox PRO-HD. It's necessary to get more information about the connections at home that you are planning to do. If you are going to connect the Slingbox to a Set-top box, you will not have any problems to stream all the channels. If the Slingbox will be connected directly to the wall using the built-in tuner, it's necessary to check first if the signal is compatible with the Slingbox; I recommend you to contact the Australian support team to confirm this:
Ph. (02) 9603 1822
Regards and hope this helps.