After waiting way too long I have finally used the Freesat tuner on my JS9000, and now see that the TV is capable of multi-satellite reception.
As I have a motorised satellite dish, I can receive signals from other, non-Freesat satellites, some of which transmit 4K content.
Before I set it up to tune in these other satellites, can anyone confirm whether the TVs satellite tuner is capable of decoding 4K transmissions?
Thanks in advance!