Sony VGX-XL3 - Manual (Page 67)

64 VGX-XL3 Digital Living System
11 Select Cable , and then select Next to continue.
12 From this screen, you tell the setup wizard if you are using a set-top box
supplied by your provider.
13 Select Yes or No , and then select Next to continue
14 Before you continue, make sure your ATSC antenna is connected to the
ATSC Digital TV tuner.