Hoping someone can help me out...recently, I've noticed when I installed the new comcast digital converter boxes on my tv's, my modulation channels are not working? I have a channel vision modulator with an lpf-600 filter and usually use channels 100, 102, 104, and 106 as my four output channels.
FYI, I know it most likely has something to do with installing these new digital boxes because I can go to a tv that does not have one of these boxes installed and the modulation still works. This tells me nothing is wrong with my modulator or filter I assume.
Thanks for any assistance you can provide,