Can someone explain exactly what a DC block does, i know it says it blocks DC voltage from your radio but i still don't understand, Like i use a LNA and i'm using a two way splitter that goes to my sds100 and my rtl-sdr i use a compleatly different antenna that goes to my pro 652 and the scanners are beside each other, so what would something like This do to help anything at all or would it do nothing at all. i get it blocks dc voltage from the radio but what does that do for performance? Thanks