My home router ip range is 192.168.1.254 - 192.168.1.64; the gateway being 192.168.1.254. I have set the WA801 to have a static ip of 192.168.1.20 i.e. outside the normal ip range of my home router

I have this AP connected to my home router directly via an ethernet cable. It is configured as an access point and dhcp is turned off. I have a Desktop PC connected by an ethernet cable into the back...

I'm thinking of purchasing one of these devices to put in my garden office (that has an ethernet cable in it from the home router) but have a coupe of newbie questions. Question 1. Some confusion...