Asus My Cinema Series - Manual (Page 42)

2-20 Chapter 3: Software information
3. Select Signal Type from the
signal settings window, then
press OK.
You can also change these settings using the Settings screen
4. Select Digital from the menu,
then press OK.
5. Choose the Capture Source from
the menu, then press OK.
6. Highlight the Apply button, then
press OK.
The Capture Source option is only for the ASUS MyCinema U3000 digital TV
tuner box. This item is set to Internal Antenna by default.