At home, I have a Direct TV Slimline 5 dish with 1 HD DVR, 1 HD rcvr, and 2 regular receivers (D-12s). I want to use one of the D-12s in my RV. After hooking everything up, I only received even numbered transponders from the 101 satellite. I am guessing this situation is caused by my Winegard dish (18 inch round with 1 LNB) on my RV. Perhaps it only receives one polarization? Do I need two feeds/LNBs to get all of the 101 transponders?