I plugged this splitter via a small satellite cable to the wall outlet and plugged my two satellite cables to this small distributor (derambox one for the other for the map skystar 2) and I can say that He don ' almost no loss.
The only drawback is that we can either watch the vertical channels at the same time or horizontal channels at the same time. This does not mean that we are obliged to look the same chain. When the Dreambox is in standby or vice versa it is possible to view the vertical and horizontal channels without problems. This is unfortunately the disadvantage of having a single cable, it has nothing to do with répartiteur.que I can only recommend.
Thank cinemaphile for his very useful comments that helped me make my choice without looking elsewhere.