Usually i think everybody knows it,but for the newcomers I want recall you that there is a hidden menu on your sky decoder:the installer set up menu. To find it press SERVICE on your remote control; then 4 (sistem set up); then 01 then SELECT.if you want to know how strong is your 2D signal (and not how strong is the default transponder) press 5 (manual tuning) then for es: for ITV1 write the freq.10.832 polar H symbol rate 22000 fec 5/6 then press find channel and you'll see what is the strenght and the quality of the signal you receive (usually 20% is enough) is the only instrument I've got ,but if you have the dish on a terrace or in another safe place it is very useful. Bye.