Sony STR-DA3700ES Operating Instructions Manual page 32

Connections required for watching programs via satellite
broadcasting or via a cable TV
Video/audio signals
*
Audio signals
It is not necessary to connect all the cords. Connect cords according to the jacks of your equipment.
* When you connect equipment with an optical digital jack, set "Audio Input Assign" in the Input Settings
menu (page 82).
32
US
Satellite tuner, Cable box with an HDMI jack
B C
or
Satellite tuner, Cable box without an HDMI jack
A
Video signals
D
or
E