Mary, I am far from a satellite expert...but I believe that any of the dome antennas can only lock in one satellite at a time. Automatic domed satellite systems access multiple satellites by “toggling,” between them when the customer changes channels with the receiver’s remote control. As a result of "toggling,” automatic domed satellite systems will only receive signal from one satellite at a time. (If my understanding is wrong, someone will be along soon to correct me.
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Oh, and I forgot to say WELCOME to iRV2!!