Sony STR-ZA3100ES Help Manual page 75

If you are using a different 4K TV or 4K projector:
Connect to one of the HDCP 2.2-compatible HDMI input jacks. If the jack is not compatible with the eARC or ARC
function, also connect an optical digital cable. For details, refer to the operating instructions supplied with your 4K
TV or 4K projector.
Note
Sony recommends that you use an HDMI cable made by Sony or another HDMI-authorized cable. Be sure to use a High Speed
HDMI Cable with Ethernet. Premium High Speed HDMI Cable with Ethernet that supports 18 Gbps is required for 4K/60p 4:4:4,
4:2:2, and 4K/60p 4:2:0 10 bit, etc.
4-686-529-11(5) Copyright 2017 Sony Corporation
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