Can anyone tell me if this receiver is capable of scaling all video to 4K output, or is it just 1080p signals? i.e. If the unit receives a 1080i or 720p signal from a device such as a STB, will it upscale the video to 4K, or just pass-through? I understand that it is capable of upscaling 1080p to 4K, but haven't been able to get confirmation or denial on this topic.
The primary reason I ask is because my DirecTV Wireless Genie box refuses to park itself at a constant output resolution. No matter what I have tried, every time my Genie loses its handshake, upon turning it all on again, the Genie will reset to outputting both 720p and 1080i. This causes major delays between some channel switches to my TV if all I am doing is passthrough on the receiver, so I need to set a constant image resolution output for optimal performance.
My current TX-SR876 is capable of doing this, but I was somewhat shocked to find out that the TX-NR646 after purchasing it did not have this feature (I know there is a very large price difference in the original MSRP between the two, but it has been 7 years, so I was hopeful things like this would have migrated down to this price point by now). I returned the 646 after only a few days because of this issue (and also due to handshake issues it had with my PS3 slim).
Thanks for any clarifications anyone can provide.