Seems like you have asked this before, and in a way, I am not sure what you are really asking because you do not show what resolution your receiver outputs for these channels.

The Octagon SF-4008 is not on the same level as a cheap ($100.00 or less) Android 4K box.

Here is a screenshot of the Masters 4K feed. Maybe it will answer your question?

[Only registered and activated users can see links. ]

Octagon is not going to produce a 4K receiver that is not capable of 4k output! It would be suicide for them to do something such as that.
Let me know if this does not answer your question and I will try something else.