Is it posible to use this kind of switch with an FTA receiver?. My CS 8100 has the SW21 on the Legacy Switch menu and that one works ok , but I tried a SW-21x with no luck. I even tyried selecting in the menu SW42 and the likes and nothing. I guess I will have to buy a 22 khz switch then?. Has this one in hand so I want to use it if possible.