Quote:
Maybe somebody could clarify for me?


An access point connects to the ethernet network and create a wireless network you can connect to it from multiple clients. An AP Client is a box which is a client to a wireless network and allows you to connect anything that has an ethernet port to the wireless network. You seem to have some idea about this though, as you realize you can't just haul your wireless router up to the roof and use it to connect to the wireless network.

If I were you I'd order an AP client (which are also called "wireless-ethernet bridges" or wireless console adapters) and a long piece of cat5 so you can look for the signal. Or if a laptop is easily available hunt around with that.

Matthew