The Model 975 is an HDMI repeater device. As with any HDMI repeater device, it needs the connection to a TV in order for the handshaking to complete successfully. This is because the TV in any HDMI connected system is the HDMI sink device and is the device in the system that is most responsible for a successful handshaking.

The HDMI output connection should be made to the TV, in order to have access to the OSD set-up menu.

Regards.