We have been in FWs for many years and have never been able to get one satellite or cable box to work both TVs from one location. Have had to move box to which ever TV we are watching. TV technician told me once that satellite and cable will not work through a splitter.
We just got our 2017 CY 3 months ago and man, how the custom projects mount up so quickly! I wrote them down, prioritized by costs, time to do, importance for happiness, and inside or outside projects (to battle the weather in winter). One project I completed runs along this thought.
The factory blu-ray was HDMI'd to living room TV. I also permantly mounted our Dish Tailgater receiver and HDMI'd it to the same set. Good to go in the living room temporarily for one trip, but we watch TV in the garage 95% of time, so what to do? enter Amazon.
I ran one 15' HDMI cable from behind the living room TV to an HDMI wall plate I installed on bottom of loft for the garage TV, then hooked that TV up to the plate. In living room behind the TV, I brought both the blu-ray and Dish receiver HDMIs to a 2 into 1 A/B switch, exited out to a 1 into 2 amplified splitter. Project done.
That one garage HDMI cable carries both blu-ray and Dish signals to the TV, as does the one HDMI cable into living room TV...set A/B switch to Satelitte or Blu-ray. I wanted to hardwire to the garage rather than wirelessly transmitting.
I had purchased an extra 15' cable in case the 2 TVs, when both on, would not have a delay between them as some literature will lead one to believe. From the amplified splitter, the living room has 3' of cable and the garage had a total run of 18' of HDMI cable.....thus some sources will tout a noticible and aggravating delay for picture/sound. There was no delay, so I didn't have to use the long cable in living room for signal balancing....everything works as I had expected. Good luck with the road you choose to go on here!!