so we just got a RF modulator for our TV so we can hook up a DVD player to it. so i hooked up the DVD player and the RF modulator, which are both brand new. the picture on the TV is really good but when i put in a DVD the screen is a blurry and it looks like these lines come up on the screen. its very terrible quality. so i dont know if its the DVD player or the modulator. my sister has one too on her TV and it works perfectly fine. the TV is older than the one i have and so is the DVD player. she got the modulator fro her friend too, so thats old. everything i have is brand new except the TV. so is it the DVD player or the RF modulator that's making the quality like that?