A single LNB can only see a single polarity at a time. This is fine as long as you only have a single tuner receiver. It has full control as to what polarity it tunes. However, once you have two tuners or multiple satellites, you need a multiswitch and a dual lnb(s).

Each dual lnb has two outputs, one for each polarity. These lines connect into the multiswitch's satellite inputs while each receiver connects into the multiswitch's receiver outputs. A multiswitch acts like an old fashion telephone switchboard. The receiver requests to be connected to a certain satellite/polarity combination. Either through relays or solid-state switches, the correct satellite's signal is routed to the receiver based on how the receiver signals the multiswitch.

By having each satellite/polarity combination available at the multiswitch, any receiver can receive any satellite polarity. Multiple receivers can use the same satellite/polarity, or they can use different ones as needed.

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by cdru edited by nozero
last modified: 2004-06-16 23:24:18