texasbrit said:But what is true, and I think what you may be getting at, is that if you set receiver I to a channel (say ESPN) and you set receiver II to the same channel, they will (should) both work...
Exactly. If the intent is to watch the same channel on both receivers then it should work. In addition, under your scenario with ESPN, can you not watch any other channel on Receiver II that belongs to the same set that ESPN belongs to? I imagine there are quite a few channels on the same set as ESPN.
The problem that could be created is if someone at Receiver II changes the channel to something that causes Receiver II to generate the 22 kHz tone. This would then cause the multi-switch to switch and you would lose ESPN on Receiver I. So, install a filter that notches 22kHz between Receiver II and the splitter and it would render Recevier II completely docile.