My Hathway cable operator does not show many free-to-air tv channels despite requests. Also sometimes the cable operators power supply goes off.
Here is an idea which I am using to watch cable and fta set-top box channels together and only fta channels when cable outage occurs.
[*]Then tune to a tv channel on your fta stb and adjust its RF Output to the same channel as shown:
How the actual wiring looks: