The prospect of digital technology for television signals has been around awhile and is what enables video recorders to be used without video tape. By using digital satellite TV signals, the picture quality is as close to high definition as can be obtained with less than three LNB inputs in your receiver.
The signal being bounced back to Earth by digital satellite TV companies is not able to be received or viewed with most analog systems and offers a better quality picture over the distance it travels. An advantage to digital satellite TV signals is that they can be directed to multiple receivers, enabling you to watch a different program on different receivers, if your satellite is equipped with two or more LNB lines.
Connecting the same output from your receiver to multiple television sets will only able you to watch the same program on all of the sets connected. If you have a recorder connected to your digital satellite TV, digital or videocassette, with one LNB input you can only record the channel you are watching. With a dual LND system you can record one channel while watching different programming on your television set.
Digital Quality Beats Analog...