Turn OFF SCALER if play 4K TV. To get 4K HQ picture, Pls set Source to 4K, Power on 4K TV firstly, then connect HDBaseT Extender TX RX. ARC USAGE - Set ARC on Extender Receiver (TV ARC or SPDIF) --- Switch to TV mode, turn on TV ARC function, connect HDMI OUT to TV ARC port and AVR ARC port --- ARC support 5.1ch audio only, NOT ATMOS, pls ensure HDMI source, TV, AVR support 5.1ch firstly.
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