I'm assuming that you are in the UK ford570, you need to decide which satellite you want to receive and then select it on the receiver.
Once you,ve done that, you need to point the dish, possibly with the aid of a compass, at the satellite you have set the receiver to.
Depending which satellite you are trying for, (may be easier to start off with Astra 28.2 East, as you can compare the direction with other neighbours' dishes) you then need to set the dish elevation.