Winegard makes and add-on for the Sensar (Batwing) called the Sensar Pro. Not only does it detect the channels but allows you to accurately point the antenna before you do the required channel scan allowing for reception of maximum channels. It also has a secondary amplifier built in so when you are in areas of weak reception you can pull in otherwise unusable channels.
The good news and bad news is that the Winegard antenna IS more directional than the Jack. That means when you are in an area with channels coming from multiple locations (you are in the city and towers are spread around) you will get more channels with the Jack. However, when you move out away from the cities the towers are now all in the same general direction and the more directional antenna will provide you with better long distance reception.