Hello...New here and had a question concerning the Satellite USA multiswitch. I have the 5 lnb directv dish with about 7 receivers. I upgraded from the Zinwell 4x8 since I ran out of outputs. Switched everything over and could never acquire a signal. The Satellite USA multiswitch has a power port (19v) but no power adapter came with it. Before I forked over the $90 I wanted to check here to see if I should even need power. I guess the Zinwell is a powered multiswitch and the Satellite USA requires the add on power switch. Is this correct