I am not sure what the "switch" is you are referring too ...But as far as changing the output station/programming at intervals I use a leightronic mini t pro. You can setup a schedule and it will switch between numerous inputs. and back again depending on duration and dates set for. nice to have. dont know if this is exactly what you are lookin for .
This is CABL.com posting #183492. Tiny Link: cabl.co/mVTI