I left it on automatic.
Just been into wireless settings and it looks like all I can change is to have two seperate wireless channels one at 2.5 and the other at 5.
Didn't want to change any settings as I don't know what I am doing.
I don`t use a home hub, but from what I have read, you need to go into the advanced settings and disable "smart wireless".
Then, depending on which home hub you have, you will either have the option of selecting one of 13 channels, or only one of three channels.