Be sure that you are using the correct settings with your Sensar Pro as well. A gain setting of 10 will give no added gain and is the place to start. Going below 10 will case the signal to be weakened (attenuated) and going above 10 will add additional gain to the antennas signal. Going too high can kill a signal and going down can cause signal that is too strong to come in better. Just start at 10 and then manually select the "real" channel you are trying to lock and and adjust the antenna for the strongest signal. Generally you are going to need a signal in the 60's or above for a solid picture.