I purchased a winegard hd7082p to replace the antenna supplied by Voom (Winegard Sensar). I disconnected the coxial cable from the Sensar connected it to the cable from my new antenna with a barrel connector. Now I get nothing no local or satellite. What am I doing wrong? I did notice that the Sensar has a built in power amplifier. There is no amp or pre-amp on my new antenna. Any thoughts?