Sony KP-57WV600 Operating Instructions Manual page 23

With this connection, you can use all the dual picture features for unscrambled channels
coming directly into the TV's V~~/~~~~ input jack.
However, you can use only some of the dual picture features for channels coming
through the cable box to the TV's AUX inprlt jack. For example, when you switch the W's
input to AUX - to select the cable box inpuT --.. the picture displays only in the lefl
window. For example, if you turn on Twin View, you can watch cable channels coming
into the VHF/UHF jack in the right window, but you cannoi swap the pictures between
the left
and
right windows.