I’m using the same Quad tuner for my PMS. I have found that the quad tuner seems to act like a quad splitter, splitting up the incoming signal into four weaker signals going to each tuner. When you connect your coax directly to the your TV you have an unsplit (stronger) signal coming in. You may need a stronger pre-amp on the coax going to the Quad tuner. What is your pre-amp setup?
