What is the difference between the different Directv SWM lnb types such as sl3s4nr2-14 sl3s4nr5-01 3D1LNBR0-01 3D2LNBR0-01 3D2RBLNBR0-14 (reverse band?) and which ones will work for the markets that only require the Sl3 lnb for just a standard slimline setup to a single tuner receiver?