You preprogram the satellites into the
signal meter before usage. For example, the
Birdog will accept up to 32 satellites.
Let's say you want to aim the dish at T5. You select T5 on the meter. Once you get a lock on the signal from T5, the meter will say FOUND. It will then give you a Signal/Quality reading.
Very handy and would highly recommend it to all
installers. It will pay for itself in a short period of time.