When the dish is connected to a box, the box powers the dish with either 13 or 18 vdc to select a set of channels to be received from the satellite. The birdog only sends 13 vdc to the dish for signal finding. the channels that come off of 110 can only be received with 18vdc. Most Installers use the 101 to adjust the up-down and left-right positioning, and the 119 to adjust the tilt. On a multi-lnb dish, the voltage method is also used to select what bird you want to get channels from. with a single-lnb dish, there is no option, and thus your birdog will see a signal from 110.