I have a question on the digital TV signals..here we can get channels 2-99 on any TV, and 100-whatever only with the digital cable box. Now when I'm watching channel 5 on the digital box, is it using the exact same signal as a regular TV would for channel 5? Or are there actually two channel 5s coming in, one for a regular TV, and one for a digital box? I believe it's only one signal, but I wanted to make sure.