Are you referring to a pause button?
I prefer the XR11 and they are free at the nearest Xfinity Store.
No, not pause, STOP.
Having live tv playing all the time, or even paused, uses one of the tuners and probably some of the hard drive space. If I pressed pause and went to watch 3 hours of on demand or netflix, that tuner would be in use and 3% of my hard drive space would be used.
That's not really a big deal, It's not likely I'll be using all the disk space or all 6 tuners at once. But I never actually watch live tv on this DVR. I only use it for recording and on demand. So it's annoying that, after I finish watching on demand or netflix or a dvr recorded show, live tv is there blaring in the background while I choose what I'm going to watch next.
For now, I have just set live tv to one of the music channels.