![DIRECTV Polarity Locker and Power Supply Board DIRECTV Polarity Locker and Power Supply Board](https://www.weaknees.com/cart/images/T/t_58144.jpeg)
Locks LNBs from a DIRECTV dish (and up to two additional dishes). Used in D2 Advantage/MFH2 setup or in large residential DIRECTV installations. Ideal in situations in which a SWM (or SWM chassis) is a long distance from the dish or where are large number of DIRECTV receivers are being connected to a single dish.