You will need to buy an F type dc blocker adapter to stop the Lnb voltage from going up the co-ax, although this is really only an issue if you are going to use an aerial which is short circuit to dc. It can be useful to power a pre-amp. You will have to play along with the postcode business, it is all part of the freesat epg trying to find where you are so that it installs the correct regional programmes. With no lnb, it will probably say no channels found or similar. You then need to find the menu item to add non-freesat channels. If it can't do this, it will be no good for amateur use.