Sony VAIO VGN-AR500 Series User Manual page 45

Connecting to standard cable access (CATV)
To connect in CATV mode (Option 1)
1 Connect one end of a TV coaxial cable (1) to your cable service access (wall outlet) (2).
2 Connect the other end to the VHF/UHF port (3) on the computer.
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Using Your VAIO Computer