I just recently purchased a directv (slim Line) Hd dish that i am going to install on my own. The dish came with a HD SlimLine Three LNB3 Ka/Ku Slim Line LNB 3 that has 4 cable connection outputs on the LNB. I have not began to install the dish but my question is if I will need to purchase a Directv 21 Volt Power Inserter for my install. I am only going to use the dish/lnb to power one HD receiver. Any input would be appreciated. Thanks.