- For switching between two satellite receivers to one LNB
- Allows simultaneous connection of 2 satellite receivers (e.g. satellite receiver built in a TV and external hard drive receiver) to one coaxial cable
- Only one receiver can always be active, the receiver on output A always has priority over output B
- Example: A hard drive receiver is connected to output A and switched on, input B is therefore without signal. If the hard drive receiver (output A) is switched off