on 14-11-2012 06:32 PM
This should explain your query.
Your satellite dish can support up to eight "feeds" and the total number of boxes depends on the type you're using. Each Sky and SkyHD box requires a single feed/cable from the satellite. Sky+ and Sky+ HD boxes each require two feeds/cables as they both allow you to watch one channel whilst recording another at the same time. Here are some examples of the types of combinations:
8 standard Sky digital boxes showing live content
8 SkyHD boxes showing live content
2 SkyHD boxes and 3 Sky+ or Sky+HD boxes.
4 Sky+HD or Sky+ boxes recording one show and watching another
1 Sky+HD or Sky+ box and 6 standard Sky digital boxes